tree ffd8cd5e19d427df8e55589eaaa7803f6a3bbd6d
parent 987ce938245566f8a8568cb3b7f43ff8442c2353
author Cherry Zhang <cherryyz@google.com> 1593213453 -0400
committer Cherry Zhang <cherryyz@google.com> 1593993424 +0000

[dev.link] cmd/link: parallelize ELF relocation writing

Now that we write ELF relocation records in mapped memory with
known sizes and offsets, we can write them in parallel.

Further speed up Asmb2 pass. Linking cmd/compile with external
linking,

Asmb2        141ms ± 4%      97ms ± 5%  -30.98%  (p=0.000 n=10+9)

Change-Id: I52c2b9230e90ed4421c21d7ef13a4f1e996f6054
Reviewed-on: https://go-review.googlesource.com/c/go/+/240400
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>