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cmd/compile: static maps should preallocate size #15880

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randall77 opened this issue May 29, 2016 · 1 comment
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cmd/compile: static maps should preallocate size #15880

randall77 opened this issue May 29, 2016 · 1 comment
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FrozenDueToAge Performance
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Go1.8

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@randall77
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var m = map[int]int {
  1:1,2:2,3:3,4:4
}

Generates a call to makemap with a hint set to 0. The hint should be set to 4. This will eliminate growing during initialization, which reduces significantly the allocations required at startup.
See #15872
@randall77 randall77 added this to the Go1.8 milestone May 29, 2016
@randall77 randall77 self-assigned this May 29, 2016
@randall77 randall77 mentioned this issue May 29, 2016
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CL https://golang.org/cl/23558 mentions this issue.

@randall77 randall77 mentioned this issue Jul 6, 2016
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