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isharipo 8bb391312c cmd/link/internal/ld: don't call fieldtrack if it's not enabled
If go toolchain is not built with GOEXPERIMENT=fieldtrack,
skip fieldtrack pass in the linker as it does full symtab traversal.

For linking "hello world" example from net/http:

	name      old time/op  new time/op  delta
	Linker-4   530ms ± 2%   525ms ± 2%  -1.03%  (p=0.028 n=17+19)

Fixes #20318
Updates #14624

Change-Id: I99336513db77d13f95f47d27339d76f01c42a5da
Reviewed-on: https://go-review.googlesource.com/113635
Run-TryBot: Iskander Sharipov <iskander.sharipov@intel.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-05-17 17:12:27 +00:00
.github github: update Pull Request template 2018-02-21 02:07:46 +00:00
api syscall: introduce Pointer type and use it instead of uintptr 2018-04-18 08:50:42 +00:00
doc doc/contribute.html: remove superfluous article 2018-05-16 12:26:53 +00:00
lib/time all: use HTTPS for iana.org links 2018-02-13 18:36:48 +00:00
misc misc/wasm: fix passing large negative integers from JS to Go 2018-05-15 14:15:44 +00:00
src cmd/link/internal/ld: don't call fieldtrack if it's not enabled 2018-05-17 17:12:27 +00:00
test cmd/compile: remove now-irrelevant test 2018-05-14 20:33:00 +00:00
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.gitignore .gitignore: ignore src/cmd/dist/dist 2017-10-28 21:55:49 +00:00
AUTHORS A+C: update email address 2018-04-14 19:28:37 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS C: add Iskander Sharipov's individual CLA mail 2018-04-16 04:49:46 +00:00
favicon.ico website: recreate 16px and 32px favicon 2016-08-25 15:43:32 +00:00
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