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Martin Möhrmann 89c527007f reflect: avoid stack copies of hiter
Use a pointer reciever to avoid copying the hiter struct when
checking if it is intialized.

Found through profiling that showed reflect map iteration spending
a good amount of time in duffcopy.

This change will also help other MapIter methods checking hiter struct
initialization like Value() and Key().

name            old time/op  new time/op  delta
MapIterNext-12  97.9ns ± 4%  83.8ns ± 2%  -14.37%  (p=0.000 n=10+10)

Change-Id: I73ab964fa28061ee7e6d5c663a85048bd2e0274e
Reviewed-on: https://go-review.googlesource.com/c/go/+/360254
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Trust: Josh Bleecher Snyder <josharian@gmail.com>
Trust: Martin Möhrmann <martin@golang.org>
2021-10-31 18:39:05 +00:00
.github .github: update IRC server 2021-09-30 19:56:27 +00:00
api cmd/go: stamp VCS revision and uncommitted status into binaries 2021-10-14 18:44:37 +00:00
doc Revert "cmd/go: remove support for -buildmode=shared" 2021-10-29 17:32:24 +00:00
lib/time lib/time: fix RFC 6557 url 2021-08-15 02:18:46 +00:00
misc Revert "cmd/go: remove support for -buildmode=shared" 2021-10-29 17:32:24 +00:00
src reflect: avoid stack copies of hiter 2021-10-31 18:39:05 +00:00
test cmd/compile: emit sensible go_asm.h consts for big ints 2021-10-30 18:30:05 +00:00
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.gitignore internal/buildcfg: move build configuration out of cmd/internal/objabi 2021-04-16 19:20:53 +00:00
AUTHORS net/http: guarantee that the Transport dial functions are respected in js/wasm 2021-10-28 17:57:57 +00:00
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CONTRIBUTORS net/http: guarantee that the Transport dial functions are respected in js/wasm 2021-10-28 17:57:57 +00:00
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