doc: document PerformanceNodeTiming.environment field

PR-URL: #28280 Reviewed-By: Rich Trott <[email protected]> Reviewed-By: Ruben Bridgewater <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Trivikram Kamat <[email protected]>
nodejs · Jul 2, 2019 · 57ac661 · 57ac661
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commit 57ac661
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diff --git a/doc/api/perf_hooks.md b/doc/api/perf_hooks.md
@@ -219,6 +219,16 @@ The high resolution millisecond timestamp at which the Node.js process
 completed bootstrapping. If bootstrapping has not yet finished, the property
 has the value of -1.
 
+### performanceNodeTiming.environment
+<!-- YAML
+added: v8.5.0
+-->
+
+* {number}
+
+The high resolution millisecond timestamp at which the Node.js environment was
+initialized.
+
 ### performanceNodeTiming.loopExit
 <!-- YAML
 added: v8.5.0