use iszero in isinteger(::AbstractFloat) #55276
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giordano
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Jul 27, 2024
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It shouldn't make any difference with any of the built-in floating-point types
It may be marginally faster for BigFloat since it has a specialised iszero method not to run a ccall:
Line 1062 in 8a7e23d
Bug regardless of the magnitude of the speedup for BigFloat, the change looks good to me.
Seelengrab
reviewed
Jul 27, 2024
Co-authored-by: Sukera <[email protected]>
lazarusA
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Aug 17, 2024
This is a very slight tweak to the implementation of `isinteger(::AbstractFloat)` to use `iszero` rather than `== 0`. It shouldn't make any difference with any of the built-in floating-point types, but `iszero` might conceivably be faster for some user-defined types. I also added a comment to indicate why it's using `iszero(x - trunc(x))` rather than `x == trunc(x)` (due to non-finite values); this code dates back to JuliaLang#14569 in Julia 0.5. --------- Co-authored-by: Sukera <[email protected]>
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This is a very slight tweak to the implementation of
isinteger(::AbstractFloat)to useiszerorather than== 0. It shouldn't make any difference with any of the built-in floating-point types, butiszeromight conceivably be faster for some user-defined types.I also added a comment to indicate why it's using
iszero(x - trunc(x))rather thanx == trunc(x)(due to non-finite values); this code dates back to #14569 in Julia 0.5.