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Bryan Boreham 4c174a7ba6 testing: reduce memory allocation in Helper 
Store the PC instead of the string name of the function, and defer
that conversion until we need it.

Helper is still relatively expensive in CPU time (few hundred ns),
but memory allocation is now constant for a test rather than linear in
the number of times Helper is called.

benchstat:
name        old time/op    new time/op    delta
TBHelper-4    1.30µs ±27%    0.53µs ± 1%   -59.03%  (p=0.008 n=5+5)

name        old alloc/op   new alloc/op   delta
TBHelper-4      216B ± 0%        0B       -100.00%  (p=0.008 n=5+5)

name        old allocs/op  new allocs/op  delta
TBHelper-4      2.00 ± 0%      0.00       -100.00%  (p=0.008 n=5+5)

Change-Id: I6565feb491513815e1058637d086b0374fa94e19
GitHub-Last-Rev: c2329cf225
GitHub-Pull-Request: golang/go#38834
Reviewed-on: https://go-review.googlesource.com/c/go/+/231717
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
Trust: Emmanuel Odeke <emmanuel@orijtech.com>
2020-11-11 20:48:31 +00:00
.github .github: add link to questions in ISSUE_TEMPLATE 2020-01-06 17:05:31 +00:00
api api: update next.txt 2020-10-29 20:51:49 +00:00
doc doc/go1.16: add crypto/x509 CSR release note 2020-11-11 17:12:34 +00:00
lib/time lib/time, time/tzdata: update tz data to 2020d 2020-10-24 21:42:44 +00:00
misc cmd/dist,cmd/go,runtime: add support for cgo on linux/riscv64 2020-11-03 12:59:51 +00:00
src testing: reduce memory allocation in Helper 2020-11-11 20:48:31 +00:00
test cmd/compile: make sure linkname'd symbol is non-package 2020-11-09 16:09:16 +00:00
.gitattributes all: treat all files as binary, but check in .bat with CRLF 2020-06-08 15:31:43 +00:00
.gitignore .gitignore: ignore src/cmd/dist/dist 2017-10-28 21:55:49 +00:00
AUTHORS A+C: add Kush Patel (corporate CLA for Hootsuite Inc) 2020-07-08 00:10:44 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS CONTRIBUTORS: update for the Go 1.15 release 2020-08-10 21:51:48 +00:00
favicon.ico website: recreate 16px and 32px favicon 2016-08-25 15:43:32 +00:00
LICENSE
PATENTS
README.md README: linkify some paths 2018-06-06 18:07:01 +00:00
robots.txt
SECURITY.md SECURITY.md: update go versions 2019-09-26 15:34:57 +00:00

README.md

The Go Programming Language

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