bm-20241025-azure-x86_64-faster%2dcpython-split_load_const-3.14.0a1+-f934559-pystats-vs-base.md

Execution counts

Execution counts for Tier 1 instructions.

The "miss ratio" column shows the percentage of times the instruction executed that it deoptimized. When this happens, the base unspecialized instruction is not counted.

Name	Base Count	Head Count	Change
LOAD_CONST	13,759,243,594	1,715,561,348	-87.5%
RETURN_VALUE	3,576,885,953	5,164,640,614	44.4%
UNARY_INVERT	10,379,832	10,909,301	5.1%
LOAD_FAST_CHECK	3,947,605	4,124,077	4.5%
LOAD_SPECIAL	13,543,410	14,014,186	3.5%
EXTENDED_ARG	361,620,862	372,932,982	3.1%
IMPORT_NAME	8,517,063	8,635,748	1.4%
IMPORT_FROM	8,787,602	8,906,557	1.4%
LOAD_SUPER_ATTR_METHOD	59,356,073	60,003,096	1.1%
CALL_BOUND_METHOD_GENERAL	7,631,142	7,690,113	0.8%
CALL_KW_BOUND_METHOD	1,722,276	1,710,274	-0.7%
TO_BOOL_INT	255,222,744	256,954,926	0.7%
LOAD_ATTR_PROPERTY	70,995,890	71,233,982	0.3%
TO_BOOL_LIST	84,864,189	85,148,670	0.3%
LOAD_ATTR	747,265,755	749,278,275	0.3%
LOAD_NAME	9,741,324	9,716,320	-0.3%
CALL_PY_GENERAL	316,364,700	317,161,180	0.3%
CALL_BUILTIN_CLASS	148,350,000	148,703,914	0.2%
LOAD_ATTR_NONDESCRIPTOR_WITH_VALUES	223,415,834	223,945,060	0.2%
BINARY_OP	1,058,265,284	1,060,588,922	0.2%
LOAD_FAST_AND_CLEAR	69,215,745	69,365,113	0.2%
RESUME	18,504	18,543	0.2%
BUILD_MAP	108,143,896	108,349,624	0.2%
POP_JUMP_IF_NOT_NONE	523,575,659	524,565,834	0.2%
COPY_FREE_VARS	343,549,322	344,181,461	0.2%
LOAD_ATTR_MODULE	495,922,034	496,794,910	0.2%
STORE_SUBSCR_DICT	230,786,541	231,187,120	0.2%
CALL_NON_PY_GENERAL	982,234,835	983,939,113	0.2%
CALL_METHOD_DESCRIPTOR_FAST	355,029,494	355,583,290	0.2%
JUMP_FORWARD	381,111,614	381,671,865	0.1%
LIST_EXTEND	90,172,241	90,290,267	0.1%
STORE_ATTR_INSTANCE_VALUE	966,743,769	967,920,771	0.1%
LOAD_GLOBAL_MODULE	3,239,271,489	3,243,053,001	0.1%
CALL_PY_EXACT_ARGS	3,127,431,687	3,130,695,508	0.1%
UNARY_NOT	57,706,209	57,765,313	0.1%
IS_OP	517,170,187	516,648,049	-0.1%
FOR_ITER_GEN	241,506,534	241,266,522	-0.1%
CONTAINS_OP	151,538,838	151,388,968	-0.1%
CONTAINS_OP_DICT	404,204,393	404,603,642	0.1%
LOAD_ATTR_METHOD_WITH_VALUES	2,455,560,593	2,457,708,597	0.1%
BUILD_LIST	657,803,597	658,365,332	0.1%
POP_TOP	3,095,985,060	3,098,590,742	0.1%
RESUME_CHECK	6,174,315,043	6,179,312,029	0.1%
LOAD_ATTR_INSTANCE_VALUE	4,812,440,426	4,815,993,958	0.1%
CALL_METHOD_DESCRIPTOR_NOARGS	333,151,520	333,386,957	0.1%
NOP	2,471,830,884	2,473,522,751	0.1%
CALL_KW_PY	93,861,647	93,921,176	0.1%
SWAP	1,927,089,580	1,928,292,865	0.1%
FOR_ITER_LIST	2,048,982,508	2,050,184,125	0.1%
COPY	2,068,228,239	2,069,405,741	0.1%
GET_ITER	1,050,068,205	1,050,630,809	0.1%
BINARY_OP_SUBTRACT_FLOAT	352,604,324	352,780,691	0.1%
LOAD_FAST	36,535,081,627	36,553,224,142	0.0%
LIST_APPEND	225,078,454	225,188,209	0.0%
INTERPRETER_EXIT	1,758,796,216	1,759,647,689	0.0%
CALL_ISINSTANCE	838,152,788	838,523,894	0.0%
BINARY_SUBSCR_TUPLE_INT	292,754,414	292,628,667	-0.0%
LOAD_ATTR_METHOD_NO_DICT	2,430,617,081	2,431,515,573	0.0%
YIELD_VALUE	1,079,001,878	1,078,620,954	-0.0%
LOAD_DEREF	1,315,682,932	1,316,138,649	0.0%
UNPACK_SEQUENCE_TUPLE	398,663,493	398,526,919	-0.0%
LOAD_GLOBAL_BUILTIN	5,661,078,149	5,662,932,325	0.0%
STORE_FAST	12,901,325,456	12,905,492,882	0.0%
BINARY_OP_ADD_FLOAT	510,536,244	510,692,695	0.0%
STORE_FAST_STORE_FAST	735,444,947	735,226,003	-0.0%
POP_JUMP_IF_TRUE	1,670,220,240	1,670,716,354	0.0%
FOR_ITER	1,088,469,700	1,088,146,567	-0.0%
PUSH_NULL	1,330,590,502	1,330,982,982	0.0%
POP_JUMP_IF_FALSE	10,663,826,201	10,666,905,045	0.0%
FOR_ITER_RANGE	625,423,768	625,601,292	0.0%
TO_BOOL_BOOL	3,834,397,109	3,835,445,896	0.0%
COMPARE_OP_INT	2,602,812,341	2,603,503,367	0.0%
BUILD_TUPLE	1,139,963,772	1,140,262,286	0.0%
LOAD_FAST_LOAD_FAST	9,955,123,100	9,957,666,125	0.0%
POP_JUMP_IF_NONE	271,189,622	271,247,294	0.0%
CALL_FUNCTION_EX	153,318,409	153,290,750	-0.0%
FOR_ITER_TUPLE	532,792,986	532,699,830	-0.0%
BUILD_SET	783,780	783,899	0.0%
CALL_TYPE_1	368,925,161	368,875,262	-0.0%
CALL_BOUND_METHOD_EXACT_ARGS	172,952,798	172,929,661	-0.0%
UNPACK_SEQUENCE_TWO_TUPLE	729,737,682	729,644,005	-0.0%
CALL_BUILTIN_FAST	1,042,000,428	1,042,117,052	0.0%
CALL_BUILTIN_FAST_WITH_KEYWORDS	95,344,578	95,334,021	-0.0%
BINARY_SUBSCR	2,355,124,027	2,354,863,573	-0.0%
COMPARE_OP	517,333,084	517,384,581	0.0%
LOAD_ATTR_WITH_HINT	82,411,631	82,404,530	-0.0%
CALL	347,424	347,395	-0.0%
TO_BOOL_STR	76,955,827	76,949,426	-0.0%
UNPACK_SEQUENCE	1,829,015	1,829,111	0.0%
SET_FUNCTION_ATTRIBUTE	96,230,956	96,226,047	-0.0%
CALL_LIST_APPEND	1,237,928,182	1,237,987,604	0.0%
BINARY_SUBSCR_LIST_INT	2,515,572,546	2,515,686,075	0.0%
DELETE_FAST	1,359,881	1,359,941	0.0%
JUMP_BACKWARD	5,264,356,240	5,264,568,507	0.0%
MAKE_FUNCTION	115,512,300	115,507,654	-0.0%
CALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS	152,620,476	152,614,504	-0.0%
COMPARE_OP_STR	1,579,249,505	1,579,309,072	0.0%
CALL_LEN	1,346,906,846	1,346,954,458	0.0%
CALL_BUILTIN_O	909,207,036	909,177,036	-0.0%
LOAD_ATTR_CLASS	376,602,097	376,590,084	-0.0%
LOAD_ATTR_NONDESCRIPTOR_NO_DICT	76,998,602	76,996,531	-0.0%
CHECK_EXC_MATCH	16,649,880	16,650,237	0.0%
POP_EXCEPT	16,986,654	16,986,985	0.0%
PUSH_EXC_INFO	16,986,679	16,987,007	0.0%
LOAD_SUPER_ATTR_ATTR	3,071,294	3,071,351	0.0%
DICT_MERGE	36,113,244	36,112,623	-0.0%
BINARY_SUBSCR_DICT	595,136,028	595,125,978	-0.0%
MAP_ADD	33,810,041	33,810,574	0.0%
CONTAINS_OP_SET	1,498,834,694	1,498,812,565	-0.0%
RETURN_GENERATOR	417,023,847	417,018,146	-0.0%
MAKE_CELL	66,839,411	66,840,269	0.0%
LOAD_ATTR_CLASS_WITH_METACLASS_CHECK	23,736,766	23,737,006	0.0%
END_FOR	101,019,640	101,018,637	-0.0%
LOAD_ATTR_SLOT	1,635,771,689	1,635,755,502	-0.0%
RAISE_VARARGS	4,409,744	4,409,784	0.0%
CALL_KW	116,859	116,860	0.0%
TO_BOOL	264,048,356	264,046,269	-0.0%
CALL_TUPLE_1	15,689,832	15,689,948	0.0%
TO_BOOL_NONE	498,555,502	498,552,140	-0.0%
INSTRUMENTED_RETURN_VALUE	29,134,260	29,134,440	0.0%
COMPARE_OP_FLOAT	180,937,966	180,939,012	0.0%
STORE_FAST_LOAD_FAST	178,236,471	178,237,291	0.0%
STORE_DEREF	72,249,817	72,250,093	0.0%
STORE_SUBSCR_LIST_INT	443,334,907	443,336,447	0.0%
LOAD_GLOBAL	14,688,286	14,688,257	-0.0%
DELETE_ATTR	1,625,184	1,625,187	0.0%
CALL_STR_1	71,766,018	71,766,150	0.0%
CALL_INTRINSIC_1	183,571,691	183,572,023	0.0%
LOAD_ATTR_METHOD_LAZY_DICT	74,966,439	74,966,561	0.0%
CALL_METHOD_DESCRIPTOR_O	255,183,194	255,182,780	-0.0%
UNARY_NEGATIVE	127,568,636	127,568,778	0.0%
STORE_ATTR	67,041,641	67,041,711	0.0%
STORE_ATTR_SLOT	975,414,007	975,414,987	0.0%
EXIT_INIT_CHECK	74,671,580	74,671,655	0.0%
CALL_ALLOC_AND_ENTER_INIT	76,725,855	76,725,930	0.0%
CALL_KW_NON_PY	83,464,934	83,464,998	0.0%
JUMP_BACKWARD_NO_INTERRUPT	418,036,613	418,036,427	-0.0%
BINARY_OP_ADD_INT	3,442,395,797	3,442,397,254	0.0%
TO_BOOL_ALWAYS_TRUE	209,973,968	209,974,050	0.0%
GET_YIELD_FROM_ITER	35,910,132	35,910,144	0.0%
BINARY_SLICE	179,842,623	179,842,670	0.0%
UNPACK_SEQUENCE_LIST	61,918,259	61,918,275	0.0%
BINARY_OP_SUBTRACT_INT	1,619,098,446	1,619,098,826	0.0%
BINARY_OP_MULTIPLY_INT	277,373,336	277,373,385	0.0%
BINARY_SUBSCR_GETITEM	154,780,156	154,780,169	0.0%
STORE_SUBSCR	701,137,346	701,137,395	0.0%
DELETE_SUBSCR	131,508,567	131,508,564	-0.0%
SEND_GEN	593,512,126	593,512,138	0.0%
BINARY_OP_MULTIPLY_FLOAT	1,053,387,354	1,053,387,353	-0.0%
RETURN_CONST	1,582,376,748
BINARY_SUBSCR_STR_INT	1,255,874,976	1,255,874,976	0.0%
END_SEND	302,934,350	302,934,350	0.0%
GET_AWAITABLE	173,019,749	173,019,749	0.0%
BUILD_SLICE	156,861,882	156,861,882	0.0%
SEND	129,104,887	129,104,887	0.0%
FORMAT_SIMPLE	120,810,596	120,810,596	0.0%
CONVERT_VALUE	114,790,073	114,790,073	0.0%
STORE_SLICE	112,686,502	112,686,502	0.0%
GET_ANEXT	100,136,760	100,136,760	0.0%
BINARY_OP_ADD_UNICODE	69,851,931	69,851,931	0.0%
BUILD_STRING	60,764,764	60,764,764	0.0%
INSTRUMENTED_LINE	58,270,440	58,270,440	0.0%
INSTRUMENTED_RESUME	29,134,740	29,134,740	0.0%
STORE_ATTR_WITH_HINT	8,976,815	8,976,815	0.0%
BINARY_OP_INPLACE_ADD_UNICODE	6,451,585	6,451,585	0.0%
STORE_GLOBAL	6,152,511	6,152,511	0.0%
END_ASYNC_FOR	6,000,000	6,000,000	0.0%
GET_AITER	6,000,000	6,000,000	0.0%
RERAISE	2,184,504	2,184,504	0.0%
UNPACK_EX	781,020	781,020	0.0%
CLEANUP_THROW	98,794	98,794	0.0%
SET_UPDATE	84,554	84,554	0.0%
SET_ADD	59,636	59,636	0.0%
STORE_NAME	57,952	57,952	0.0%
LOAD_ATTR_GETATTRIBUTE_OVERRIDDEN	56,314	56,314	0.0%
DICT_UPDATE	17,723	17,723	0.0%
WITH_EXCEPT_START	5,359	5,359	0.0%
LOAD_BUILD_CLASS	3,944	3,944	0.0%
LOAD_LOCALS	3,649	3,649	0.0%
FORMAT_WITH_SPEC	2,753	2,753	0.0%
LOAD_SUPER_ATTR	2,752	2,752	0.0%
LOAD_FROM_DICT_OR_DEREF	1,476	1,476	0.0%
INSTRUMENTED_RETURN_CONST	180
SETUP_ANNOTATIONS	170	170	0.0%
INSTRUMENTED_JUMP_BACKWARD	120	120	0.0%
DELETE_NAME	40	40	0.0%
LOAD_FROM_DICT_OR_GLOBALS	3	3	0.0%
LOAD_INT		7,212,529,567
LOAD_CONST_IMMORTAL		6,417,663,761

Pair counts

Pair counts for top 100 opcode pairs

Pairs of specialized operations that deoptimize and are then followed by the corresponding unspecialized instruction are not counted as pairs.

Not included in comparative output.

Predecessor/Successor Pairs

Top 5 predecessors and successors of each Tier 1 opcode.

This does not include the unspecialized instructions that occur after a specialized instruction deoptimizes.

Not included in comparative output.

Specialization stats

Specialization stats by family

BINARY_OP

specialization stats for BINARY_OP family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
miss ⓘ Specialized instructions that deopt.	37,796,558	0.5%	37,900,147	0.5%	0.3%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	1,057,069,373	12.6%	1,059,386,635	12.6%	0.2%
hit ⓘ Specialized instructions that complete.	7,293,902,459	86.9%	7,294,133,573	86.9%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Failure	1,189,732	62.3%	1,196,107	62.4%	0.5%
Success	719,306	37.7%	721,261	37.6%	0.3%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
add different types	163,012	13.7%	168,882	14.1%	3.6%
or	7,268	0.6%	7,475	0.6%	2.8%
and int	34,637	2.9%	34,960	2.9%	0.9%
and other	1,249	0.1%	1,253	0.1%	0.3%
floor divide	34,025	2.9%	34,004	2.8%	-0.1%
remainder	43,043	3.6%	43,029	3.6%	-0.0%
rshift	23,513	2.0%	23,510	2.0%	-0.0%
add other	36,760	3.1%	36,764	3.1%	0.0%
subtract different types	580,532	48.8%	580,537	48.5%	0.0%
multiply different types	175,029	14.7%	175,029	14.6%	0.0%
true divide different types	19,887	1.7%	19,887	1.7%	0.0%
lshift	19,490	1.6%	19,490	1.6%	0.0%
xor	18,783	1.6%	18,783	1.6%	0.0%
true divide float	11,592	1.0%	11,592	1.0%	0.0%
subtract other	8,515	0.7%	8,515	0.7%	0.0%
power	8,208	0.7%	8,208	0.7%	0.0%
multiply other	2,678	0.2%	2,678	0.2%	0.0%
true divide other	1,427	0.1%	1,427	0.1%	0.0%
and different types	84	0.0%	84	0.0%	0.0%

BINARY_SLICE

specialization stats for BINARY_SLICE family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	179,842,623	100.0%	179,842,670	100.0%	0.0%

BINARY_SUBSCR

specialization stats for BINARY_SUBSCR family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	2,354,509,430	32.8%	2,354,249,043	32.8%	-0.0%
hit ⓘ Specialized instructions that complete.	4,808,191,859	67.1%	4,808,169,589	67.1%	-0.0%
miss ⓘ Specialized instructions that deopt.	5,926,261	0.1%	5,926,276	0.1%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Failure	606,375	83.5%	606,308	83.5%	-0.0%
Success	119,850	16.5%	119,850	16.5%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
other	196,836	32.5%	196,774	32.5%	-0.0%
tuple slice	12,527	2.1%	12,526	2.1%	-0.0%
list slice	192,268	31.7%	192,263	31.7%	-0.0%
out of range	46,681	7.7%	46,682	7.7%	0.0%
array int	121,418	20.0%	121,418	20.0%	0.0%
buffer int	28,959	4.8%	28,959	4.8%	0.0%
string slice	3,636	0.6%	3,636	0.6%	0.0%
sequence int	2,941	0.5%	2,941	0.5%	0.0%
buffer slice	1,015	0.2%	1,015	0.2%	0.0%
code complex parameters	73	0.0%	73	0.0%	0.0%
array slice	21	0.0%	21	0.0%	0.0%

CALL

specialization stats for CALL family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
miss ⓘ Specialized instructions that deopt.	152,121,106	1.4%	152,046,472	1.4%	-0.0%
hit ⓘ Specialized instructions that complete.	10,571,824,670	98.6%	10,576,758,285	98.6%	0.0%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	204,304	0.0%	204,380	0.0%	0.0%
deopt ⓘ Specialized instructions that deopt.	22,186	0.0%	22,186	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	3,030,113	100.0%	3,028,591	100.0%	-0.1%
Failure	486	0.0%	486	0.0%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
init not simple	732	150.6%	732	150.6%	0.0%
out of versions	486	100.0%	486	100.0%	0.0%
init not inline values	374	77.0%	374	77.0%	0.0%
init not python	288	59.3%	288	59.3%	0.0%

CALL_KW

specialization stats for CALL_KW family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	109,638	15.4%	109,638	15.4%	0.0%
miss ⓘ Specialized instructions that deopt.	592,926	83.5%	592,926	83.5%	0.0%

COMPARE_OP

specialization stats for COMPARE_OP family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
miss ⓘ Specialized instructions that deopt.	1,087,862	0.0%	1,145,611	0.0%	5.3%
hit ⓘ Specialized instructions that complete.	4,361,911,950	89.4%	4,362,605,840	89.4%	0.0%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	517,129,827	10.6%	517,180,311	10.6%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	28,320	12.7%	29,384	13.0%	3.8%
Failure	195,358	87.3%	196,395	87.0%	0.5%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
float long	13,057	6.7%	14,193	7.2%	8.7%
bool	2,017	1.0%	1,986	1.0%	-1.5%
other	7,865	4.0%	7,891	4.0%	0.3%
big int	23,451	12.0%	23,401	11.9%	-0.2%
different types	29,521	15.1%	29,489	15.0%	-0.1%
set	6,824	3.5%	6,821	3.5%	-0.0%
baseobject	11,949	6.1%	11,947	6.1%	-0.0%
tuple	90,334	46.2%	90,327	46.0%	-0.0%
string	7,639	3.9%	7,639	3.9%	0.0%
bytes	1,358	0.7%	1,358	0.7%	0.0%
list	999	0.5%	999	0.5%	0.0%
long float	344	0.2%	344	0.2%	0.0%

CONTAINS_OP

specialization stats for CONTAINS_OP family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	151,477,870	7.4%	151,328,048	7.4%	-0.1%
hit ⓘ Specialized instructions that complete.	1,901,122,100	92.5%	1,901,499,220	92.5%	0.0%
miss ⓘ Specialized instructions that deopt.	1,916,987	0.1%	1,916,987	0.1%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Failure	58,704	60.4%	58,656	60.4%	-0.1%
Success	38,438	39.6%	38,438	39.6%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
other	12,035	20.5%	11,995	20.4%	-0.3%
tuple	11,998	20.4%	11,990	20.4%	-0.1%
str	20,310	34.6%	20,310	34.6%	0.0%
list	14,361	24.5%	14,361	24.5%	0.0%

FOR_ITER

specialization stats for FOR_ITER family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	3,284,785,798	72.4%	3,285,794,020	72.4%	0.0%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	1,088,135,563	24.0%	1,087,810,811	24.0%	-0.0%
miss ⓘ Specialized instructions that deopt.	163,919,998	3.6%	163,957,749	3.6%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Failure	330,537	9.6%	332,151	9.7%	0.5%
Success	3,096,243	90.4%	3,096,961	90.3%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
dict items	64,883	19.6%	66,566	20.0%	2.6%
set	19,484	5.9%	19,425	5.8%	-0.3%
itertools	4,487	1.4%	4,479	1.3%	-0.2%
dict values	6,363	1.9%	6,360	1.9%	-0.0%
other	10,441	3.2%	10,438	3.1%	-0.0%
enumerate	26,532	8.0%	26,536	8.0%	0.0%
zip	172,057	52.1%	172,057	51.8%	0.0%
seq iter	14,944	4.5%	14,944	4.5%	0.0%
ascii string	3,439	1.0%	3,439	1.0%	0.0%
reversed list	2,980	0.9%	2,980	0.9%	0.0%
dict keys	2,797	0.8%	2,797	0.8%	0.0%
bytes	1,264	0.4%	1,264	0.4%	0.0%
map	736	0.2%	736	0.2%	0.0%
callable	130	0.0%	130	0.0%	0.0%

LOAD_ATTR

specialization stats for LOAD_ATTR family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	745,727,616	5.5%	747,739,790	5.5%	0.3%
hit ⓘ Specialized instructions that complete.	11,877,441,425	87.9%	11,885,642,039	87.9%	0.1%
miss ⓘ Specialized instructions that deopt.	882,053,971	6.5%	882,056,569	6.5%	0.0%
deopt ⓘ Specialized instructions that deopt.	1,404,480	0.0%	1,404,480	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Failure	287,527	1.6%	287,960	1.6%	0.2%
Success	17,884,108	98.4%	17,884,061	98.4%	-0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
overriding descriptor	59,190	20.6%	59,510	20.7%	0.5%
non overriding descriptor	6,424	2.2%	6,451	2.2%	0.4%
class method obj	16,919	5.9%	16,932	5.9%	0.1%
module attr not found	1,363	0.5%	1,362	0.5%	-0.1%
not managed dict	1,567	0.5%	1,568	0.5%	0.1%
method	82,673	28.8%	82,718	28.7%	0.1%
metaclass attribute	25,277	8.8%	25,271	8.8%	-0.0%
mutable class	62,261	21.7%	62,247	21.6%	-0.0%
overridden	8,859	3.1%	8,859	3.1%	0.0%
not in dict	7,585	2.6%	7,585	2.6%	0.0%
expected error	2,729	0.9%	2,729	0.9%	0.0%
class attr simple	1,518	0.5%	1,518	0.5%	0.0%
non object slot	1,255	0.4%	1,255	0.4%	0.0%
builtin class method	1,224	0.4%	1,224	0.4%	0.0%
out of versions	421	0.1%	421	0.1%	0.0%
wrong number arguments	235	0.1%	235	0.1%	0.0%
split dict	140	0.0%	140	0.0%	0.0%
property	48	0.0%	48	0.0%	0.0%
property not py function	40	0.0%	40	0.0%	0.0%

LOAD_GLOBAL

specialization stats for LOAD_GLOBAL family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	8,900,317,317	99.8%	8,905,953,005	99.8%	0.1%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	14,586,220	0.2%	14,586,264	0.2%	0.0%
deopt ⓘ Specialized instructions that deopt.	1,485	0.0%	1,485	0.0%	0.0%
miss ⓘ Specialized instructions that deopt.	32,321	0.0%	32,321	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	102,813	100.0%	102,740	100.0%	-0.1%
Failure	0	0.0%	0	0.0%

LOAD_SUPER_ATTR

specialization stats for LOAD_SUPER_ATTR family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	62,427,367	100.0%	63,074,447	100.0%	1.0%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	254	0.0%	254	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	2,498	100.0%	2,498	100.0%	0.0%
Failure	0	0.0%	0	0.0%

SEND

specialization stats for SEND family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	593,497,412	82.1%	593,497,424	82.1%	0.0%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	129,069,604	17.9%	129,069,604	17.9%	0.0%
miss ⓘ Specialized instructions that deopt.	14,714	0.0%	14,714	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	709	2.0%	709	2.0%	0.0%
Failure	34,846	98.0%	34,846	98.0%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
async generator send	24,440	70.1%	24,440	70.1%	0.0%
other	6,387	18.3%	6,387	18.3%	0.0%
list	3,261	9.4%	3,261	9.4%	0.0%
tuple	752	2.2%	752	2.2%	0.0%
dict keys	6	0.0%	6	0.0%	0.0%

STORE_ATTR

specialization stats for STORE_ATTR family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	1,826,528,594	90.5%	1,827,709,070	90.5%	0.1%
miss ⓘ Specialized instructions that deopt.	124,605,997	6.2%	124,603,503	6.2%	-0.0%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	66,965,093	3.3%	66,965,169	3.3%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Failure	45,047	1.9%	45,045	1.9%	-0.0%
Success	2,381,947	98.1%	2,381,856	98.1%	-0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
not managed dict	2,010	4.5%	2,007	4.5%	-0.1%
overridden	1,917	4.3%	1,918	4.3%	0.1%
class attr simple	22,020	48.9%	22,020	48.9%	0.0%
not in dict	8,652	19.2%	8,652	19.2%	0.0%
overriding descriptor	5,959	13.2%	5,959	13.2%	0.0%
property	1,744	3.9%	1,744	3.9%	0.0%
not in keys	895	2.0%	895	2.0%	0.0%
mutable class	645	1.4%	645	1.4%	0.0%
method	636	1.4%	636	1.4%	0.0%
split dict	365	0.8%	365	0.8%	0.0%
no dict	110	0.2%	110	0.2%	0.0%
non object slot	94	0.2%	94	0.2%	0.0%

STORE_SLICE

specialization stats for STORE_SLICE family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	112,686,502	100.0%	112,686,502	100.0%	0.0%

STORE_SUBSCR

specialization stats for STORE_SUBSCR family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	674,119,228	49.0%	674,521,347	49.0%	0.1%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	700,952,457	51.0%	700,952,510	51.0%	0.0%
miss ⓘ Specialized instructions that deopt.	2,220	0.0%	2,220	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	2,298	1.2%	2,294	1.2%	-0.2%
Failure	182,631	98.8%	182,631	98.8%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
other	86,612	47.4%	86,612	47.4%	0.0%
array int	48,931	26.8%	48,931	26.8%	0.0%
dict subclass no override	19,428	10.6%	19,428	10.6%	0.0%
py simple	17,664	9.7%	17,664	9.7%	0.0%
bytearray int	5,311	2.9%	5,311	2.9%	0.0%
list slice	2,934	1.6%	2,934	1.6%	0.0%
out of range	1,680	0.9%	1,680	0.9%	0.0%
array slice	68	0.0%	68	0.0%	0.0%
buffer slice	3	0.0%	3	0.0%	0.0%

TO_BOOL

specialization stats for TO_BOOL family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	4,687,468,324	92.6%	4,690,529,076	92.6%	0.1%
miss ⓘ Specialized instructions that deopt.	112,293,314	2.2%	112,288,334	2.2%	-0.0%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	263,386,110	5.2%	263,384,562	5.2%	-0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Failure	626,793	22.5%	626,278	22.5%	-0.1%
Success	2,152,883	77.5%	2,152,754	77.5%	-0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
mapping	77,666	12.4%	77,166	12.3%	-0.6%
tuple	95,985	15.3%	95,956	15.3%	-0.0%
dict	20,461	3.3%	20,455	3.3%	-0.0%
other	133,814	21.3%	133,833	21.4%	0.0%
bytes	16,666	2.7%	16,668	2.7%	0.0%
set	15,256	2.4%	15,255	2.4%	-0.0%
number	258,644	41.3%	258,644	41.3%	0.0%
sequence	7,547	1.2%	7,547	1.2%	0.0%
float	631	0.1%	631	0.1%	0.0%
bytearray	83	0.0%	83	0.0%	0.0%
memory view	40	0.0%	40	0.0%	0.0%

UNPACK_SEQUENCE

specialization stats for UNPACK_SEQUENCE family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	1,190,315,734	99.8%	1,190,085,499	99.8%	-0.0%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	1,820,651	0.2%	1,820,752	0.2%	0.0%
miss ⓘ Specialized instructions that deopt.	3,700	0.0%	3,700	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Failure	1,049	12.4%	1,044	12.4%	-0.5%
Success	7,395	87.6%	7,395	87.6%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
sequence	813	77.5%	808	77.4%	-0.6%
iterator	145	13.8%	145	13.9%	0.0%
other	91	8.7%	91	8.7%	0.0%

Specialization effectiveness

specialization effectiveness

All entries are execution counts. Should add up to the total number of Tier 1 instructions executed.

Instructions	Base Count	Base Ratio	Head Count	Head Ratio	Change
Specialized hits ⓘ Specialized instructions, e.g. LOAD_ATTR_MODULE that complete.	69,676,354,951	34.9%	76,127,764,569	37.8%	9.3%
Basic ⓘ Instructions that are not and cannot be specialized, e.g. LOAD_FAST.	121,010,129,281	60.6%	116,237,216,847	57.8%	-3.9%
Not specialized ⓘ Instructions that could be specialized but aren't, e.g. LOAD_ATTR, BINARY_SLICE.	7,388,842,379	3.7%	7,392,494,695	3.7%	0.0%
Specialized misses ⓘ Specialized instructions, e.g. LOAD_ATTR_MODULE that deopt.	1,482,496,690	0.7%	1,482,616,022	0.7%	0.0%

Deferred by instruction

Breakdown of deferred (not specialized) instruction counts by family

Name	Base Count	Base Ratio	Head Count	Head Ratio	Change
LOAD_ATTR	745,727,616	10.1%	747,739,790	10.1%	0.3%
BINARY_OP	1,057,069,373	14.3%	1,059,386,635	14.3%	0.2%
CONTAINS_OP	151,477,870	2.1%	151,328,048	2.0%	-0.1%
FOR_ITER	1,088,135,563	14.7%	1,087,810,811	14.7%	-0.0%
BINARY_SUBSCR	2,354,509,430	31.9%	2,354,249,043	31.9%	-0.0%
COMPARE_OP	517,129,827	7.0%	517,180,311	7.0%	0.0%
TO_BOOL	263,386,110	3.6%	263,384,562	3.6%	-0.0%
BINARY_SLICE	179,842,623	2.4%	179,842,670	2.4%	0.0%
STORE_SUBSCR	700,952,457	9.5%	700,952,510	9.5%	0.0%
SEND	129,069,604	1.7%	129,069,604	1.7%	0.0%

Misses by instruction

Breakdown of misses (specialized deopts) instruction counts by family

Name	Base Count	Base Ratio	Head Count	Head Ratio	Change
FOR_ITER_TUPLE	81,881,697	5.5%	81,915,574	5.5%	0.0%
LOAD_ATTR_SLOT	90,970,532	6.1%	90,975,400	6.1%	0.0%
FOR_ITER_LIST	81,959,607	5.5%	81,963,487	5.5%	0.0%
CALL_PY_EXACT_ARGS	80,921,675	5.5%	80,922,692	5.5%	0.0%
LOAD_ATTR_INSTANCE_VALUE	382,512,764	25.8%	382,511,943	25.8%	-0.0%
TO_BOOL_ALWAYS_TRUE	49,766,267	3.4%	49,766,352	3.4%	0.0%
LOAD_ATTR_NONDESCRIPTOR_WITH_VALUES	85,145,384	5.7%	85,145,515	5.7%	0.0%
LOAD_ATTR_METHOD_WITH_VALUES	265,611,879	17.9%	265,612,118	17.9%	0.0%
TO_BOOL_NONE	55,238,996	3.7%	55,238,972	3.7%	-0.0%
STORE_ATTR_INSTANCE_VALUE	101,763,592	6.9%	101,763,592	6.9%	0.0%

Call stats

Inlined calls and frame stats

This shows what fraction of calls to Python functions are inlined (i.e. not having a call at the C level) and for those that are not, where the call comes from. The various categories overlap.

Also includes the count of frame objects created.

	Base Count	Base Ratio	Head Count	Head Ratio	Change
Calls via PyEval_EvalFrame (legacy)	4,273,460	0.1%	4,262,459	0.1%	-0.3%
Frames pushed	5,214,891,971	78.8%	5,220,264,699	78.8%	0.1%
Calls via PyEval_EvalFrame (function vectorcall)	1,113,563,331	16.8%	1,114,567,139	16.8%	0.1%
Calls via PyEval_EvalFrame (vector)	1,117,840,735	16.9%	1,118,833,542	16.9%	0.1%
Calls to Python functions inlined	4,857,364,477	73.4%	4,861,504,329	73.4%	0.1%
Calls to PyEval_EvalDefault	1,763,297,046	26.6%	1,764,148,518	26.6%	0.0%
Calls via PyEval_EvalFrame (total)	1,763,297,046	26.6%	1,764,148,518	26.6%	0.0%
Calls via PyEval_EvalFrame (api)	279,170,599	4.2%	279,290,818	4.2%	0.0%
Calls via PyEval_EvalFrame (generator)	645,456,311	9.7%	645,314,976	9.7%	-0.0%
Calls via PyEval_EvalFrame (function ex)	24,999,631	0.4%	24,999,890	0.4%	0.0%
Calls via PyEval_EvalFrame (slot)	262,223,725	4.0%	262,225,313	4.0%	0.0%
Frame objects created	68,919,288	1.0%	68,919,527	1.0%	0.0%
Calls via PyEval_EvalFrame (method)	133,173,386	2.0%	133,173,398	2.0%	0.0%
Calls via PyEval_EvalFrame (build class)	3,944	0.0%	3,944	0.0%	0.0%

Object stats

Allocations, frees and dict materializatons

Below, "allocations" means "allocations that are not from a freelist". Total allocations = "Allocations from freelist" + "Allocations".

"Inline values" is the number of values arrays inlined into objects.

The cache hit/miss numbers are for the MRO cache, split into dunder and other names.

	Base Count	Base Ratio	Head Count	Head Ratio	Change
Interpreter immortal increfs	40,824,027,603	24.6%	27,215,256,390	17.9%	-33.3%
Method cache dunder misses	8,576,567		10,022,988		16.9%
Method cache collisions	66,256,200		69,516,688		4.9%
Method cache misses	58,468,327		60,284,007		3.1%
Inline values	177,473,022		177,943,798		0.3%
Immortal decrefs	23,582,181,144	12.8%	23,596,545,374	12.8%	0.1%
Mortal increfs	23,972,262,951	14.5%	23,986,306,473	15.8%	0.1%
Mortal decrefs	32,138,930,127	17.4%	32,155,088,616	17.4%	0.1%
Interpreter immortal decrefs	44,456,619,042	24.1%	44,477,278,347	24.1%	0.0%
Immortal increfs	25,350,496,564	15.3%	25,361,847,612	16.7%	0.0%
Interpreter mortal decrefs	84,259,674,696	45.7%	84,296,395,179	45.7%	0.0%
Interpreter mortal increfs	75,591,663,353	45.6%	75,623,517,929	49.7%	0.0%
Frees to freelist	8,349,698,831		8,353,185,161		0.0%
Allocations from freelist	8,349,548,820	45.4%	8,353,029,483	45.4%	0.0%
Frees	10,639,970,754		10,643,989,009		0.0%
Method cache hits	2,189,444,941		2,190,221,486		0.0%
Allocations to 512 bytes	9,978,246,423	54.2%	9,980,945,293	54.2%	0.0%
Allocations	10,055,388,075	54.6%	10,058,080,920	54.6%	0.0%
Method cache dunder hits	3,062,463,586		3,062,857,167		0.0%
Allocations to 4 kbytes	70,839,766	0.4%	70,833,661	0.4%	-0.0%
Allocations over 4 kbytes	6,301,886	0.0%	6,301,966	0.0%	0.0%
Materialize dict (on request)	4,443,443	2.5%	4,443,443	2.5%	0.0%
Materialize dict (new key)	392,275	0.2%	392,275	0.2%	0.0%
Materialize dict (too big)	13,407	0.0%	13,407	0.0%	0.0%
Materialize dict (str subclass)	0	0.0%	0	0.0%

GC stats

GC collections and effectiveness

Collected/visits gives some measure of efficiency.

Generation	Base Collections	Base Objects collected	Base Object visits	Head Collections	Head Objects collected	Head Object visits
0	0	0	0	0	0	0
1	354,220	100,984,867	15,201,361,329	354,263	101,429,676	15,034,588,633
2	7,998	4,366,432	5,245,517,734	7,998	4,366,437	5,240,926,332

Optimization (Tier 2) stats

statistics about the Tier 2 optimizer

Rare events

Counts of rare/unlikely events

Event	Base Count	Head Count	Change
set class ⓘ Setting an object's class, obj.__class__ = ...	22,592	22,592	0.0%
set bases ⓘ Setting the bases of a class, cls.__bases__ = ...	29	29	0.0%
set eval frame func ⓘ Setting the PEP 523 frame eval function _PyInterpreterState_SetFrameEvalFunc()	0	0
builtin dict ⓘ Modifying the builtins, __builtins__.__dict__[var] = ...	0	0
func modification ⓘ Modifying a function, e.g. func.__defaults__ = ..., etc.	29	29	0.0%
watched dict modification ⓘ A watched dict has been modified	0	0
watched globals modification ⓘ A watched globals() dict has been modified	0	0

Meta stats

Meta statistics

	Base Count	Head Count	Change
Number of data files	1,794	1,794	0.0%

---

Stats gathered on: 2024-10-25