5b59b32c97
The existing bulk Prog allocator is not concurrency-safe. To allow for concurrency-safe bulk allocation of Progs, I want to move Prog allocation and caching upstream, to the clients of cmd/internal/obj. This is a preliminary enabling refactoring. After this CL, instead of calling Ctxt.NewProg throughout the assemblers, we thread through a newprog function that returns a new Prog. That function is set up to be Ctxt.NewProg, so there are no real changes in this CL; this CL only establishes the plumbing. Passes toolstash-check -all. Negligible compiler performance impact. Updates #15756 name old time/op new time/op delta Template 213ms ± 3% 214ms ± 4% ~ (p=0.574 n=49+47) Unicode 90.1ms ± 5% 89.9ms ± 4% ~ (p=0.417 n=50+49) GoTypes 585ms ± 4% 584ms ± 3% ~ (p=0.466 n=49+49) SSA 6.50s ± 3% 6.52s ± 2% ~ (p=0.251 n=49+49) Flate 128ms ± 4% 128ms ± 4% ~ (p=0.673 n=49+50) GoParser 152ms ± 3% 152ms ± 3% ~ (p=0.810 n=48+49) Reflect 372ms ± 4% 372ms ± 5% ~ (p=0.778 n=49+50) Tar 113ms ± 5% 111ms ± 4% -0.98% (p=0.016 n=50+49) XML 208ms ± 3% 208ms ± 2% ~ (p=0.483 n=47+49) [Geo mean] 285ms 285ms -0.17% name old user-ns/op new user-ns/op delta Template 253M ± 8% 254M ± 9% ~ (p=0.899 n=50+50) Unicode 106M ± 9% 106M ±11% ~ (p=0.642 n=50+50) GoTypes 736M ± 4% 740M ± 4% ~ (p=0.121 n=50+49) SSA 8.82G ± 3% 8.88G ± 2% +0.65% (p=0.006 n=49+48) Flate 147M ± 4% 147M ± 5% ~ (p=0.844 n=47+48) GoParser 179M ± 4% 178M ± 6% ~ (p=0.785 n=50+50) Reflect 443M ± 6% 441M ± 5% ~ (p=0.850 n=48+47) Tar 126M ± 5% 126M ± 5% ~ (p=0.734 n=50+50) XML 244M ± 5% 244M ± 5% ~ (p=0.594 n=49+50) [Geo mean] 341M 341M +0.11% Change-Id: Ice962f61eb3a524c2db00a166cb582c22caa7d68 Reviewed-on: https://go-review.googlesource.com/39633 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org> |
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