tree 9f42a816b87ed1891c276f76c87cfb6a673804e4
parent 036812b2e83c0ddf193dd5a34e034151da389d09
author Changkun Ou <hi@changkun.de> 1651937452 +0200
committer Gopher Robot <gobot@golang.org> 1652475916 +0000

x/sync/errgroup: add TryGo and SetLimit to control concurrency

This benchmark shows the difference between two implementations.
Using explicit waiter with mutex (old, before PS3) or channel (new,
since PS4). There is no significant difference at a measure:

name  old time/op    new time/op    delta
Go-8     247ns ±10%     245ns ±10%     ~     (p=0.571 n=5+10)

name  old alloc/op   new alloc/op   delta
Go-8     48.0B ± 0%     40.0B ± 0%  -16.67%  (p=0.000 n=5+10)

name  old allocs/op  new allocs/op  delta
Go-8      2.00 ± 0%      2.00 ± 0%     ~     (all equal)

Fixes golang/go#27837

Change-Id: I60247f1a2a1cdce2b180f10b409e37de8b82341e
Reviewed-on: https://go-review.googlesource.com/c/sync/+/405174
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Changkun Ou <mail@changkun.de>
Auto-Submit: Bryan Mills <bcmills@google.com>