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 <[email protected]>
Reviewed-by: Heschi Kreinick <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Run-TryBot: Changkun Ou <[email protected]>
Auto-Submit: Bryan Mills <[email protected]>

…nlimited)

Change-Id: I1926e6faf821a7adb6c1365d18432abb0f856367
Reviewed-on: https://go-review.googlesource.com/c/sync/+/409774
Run-TryBot: Bryan Mills <[email protected]>
Reviewed-by: Bryan Mills <[email protected]>
Reviewed-by: Changkun Ou <[email protected]>
Run-TryBot: Changkun Ou <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>

In 2009, Google's open-source lawyers asked us to create the AUTHORS
file to define "The Go Authors", and the CONTRIBUTORS file was in
keeping with open source best practices of the time.

Re-reviewing our repos now in 2022, the open-source lawyers are
comfortable with source control history taking the place of the
AUTHORS file, and most open source projects no longer maintain
CONTRIBUTORS files.

To ease maintenance, remove AUTHORS and CONTRIBUTORS from all repos.

For golang/go#53961.

Change-Id: I182181f0c116a7218ad9aba1c7a645fe0190762a
Reviewed-on: https://go-review.googlesource.com/c/sync/+/418922
Reviewed-by: David Chase <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Run-TryBot: Russ Cox <[email protected]>

Even thought Go cancels the context in g, if it's not nil, it'll call
any subsequent function, regardless if a previous call of f returned an error or not.

Fixes golang/go#54045

Change-Id: Ie6059925f45458cf393bf1fc8949ce16be8e6f2a
Reviewed-on: https://go-review.googlesource.com/c/sync/+/424634
TryBot-Result: Gopher Robot <[email protected]>
Auto-Submit: Bryan Mills <[email protected]>
Run-TryBot: Bryan Mills <[email protected]>
Reviewed-by: Bryan Mills <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>

Change-Id: I32c367338e1ea95aaaaa8e891f5dfe4ab6c03913
GitHub-Last-Rev: a2b25df
GitHub-Pull-Request: #18
Reviewed-on: https://go-review.googlesource.com/c/sync/+/429058
TryBot-Result: Gopher Robot <[email protected]>
Run-TryBot: Bryan Mills <[email protected]>
Reviewed-by: Michael Knyszek <[email protected]>
Auto-Submit: Bryan Mills <[email protected]>
Reviewed-by: Bryan Mills <[email protected]>

Port from CL 433315.

Change-Id: Iaf6ab4676dd10a73443c3c9981ffc77233b4631c
Reviewed-on: https://go-review.googlesource.com/c/sync/+/433555
Reviewed-by: Bryan Mills <[email protected]>
Run-TryBot: Cuong Manh Le <[email protected]>
Auto-Submit: Cuong Manh Le <[email protected]>
Reviewed-by: Cherry Mui <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>

This is port of CL 436437, but without the test. ForgotUnshared has not
been ported here yet.

Change-Id: Id54d0c41d1a7948bf008e458c44b21670ada81e4
Reviewed-on: https://go-review.googlesource.com/c/sync/+/436495
Run-TryBot: Cuong Manh Le <[email protected]>
Reviewed-by: Bryan Mills <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Auto-Submit: Cuong Manh Le <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>