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debug/gosym: bulk allocate Syms
name old time/op new time/op delta 115/NewLineTable-8 80.7ns ± 1% 81.7ns ± 3% ~ (p=0.408 n=10+8) 115/NewTable-8 76.3µs ± 2% 63.3µs ± 3% -17.03% (p=0.000 n=9+9) 115/LineToPC-8 56.8µs ± 2% 56.8µs ± 3% ~ (p=0.905 n=10+9) 115/PCToLine-8 252ns ± 1% 256ns ± 5% ~ (p=0.183 n=10+10) name old alloc/op new alloc/op delta 115/NewLineTable-8 384B ± 0% 384B ± 0% ~ (all equal) 115/NewTable-8 164kB ± 0% 172kB ± 0% +4.97% (p=0.000 n=10+10) 115/LineToPC-8 0.00B 0.00B ~ (all equal) 115/PCToLine-8 0.00B 0.00B ~ (all equal) name old allocs/op new allocs/op delta 115/NewLineTable-8 3.00 ± 0% 3.00 ± 0% ~ (all equal) 115/NewTable-8 1.04k ± 0% 0.01k ± 0% -98.75% (p=0.000 n=10+10) 115/LineToPC-8 0.00 0.00 ~ (all equal) 115/PCToLine-8 0.00 0.00 ~ (all equal) Change-Id: Ibfe6c0cb86737dee8209cb1f58f5b796aa7b30aa Reviewed-on: https://go-review.googlesource.com/c/go/+/353134 Trust: Josh Bleecher Snyder <josharian@gmail.com> Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
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@ -297,6 +297,7 @@ func (t *LineTable) go12Funcs() []Func {
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ft := t.funcTab()
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funcs := make([]Func, ft.Count())
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syms := make([]Sym, len(funcs))
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for i := range funcs {
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f := &funcs[i]
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f.Entry = ft.pc(i)
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@ -304,13 +305,14 @@ func (t *LineTable) go12Funcs() []Func {
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info := t.funcData(uint32(i))
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f.LineTable = t
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f.FrameSize = int(info.deferreturn())
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f.Sym = &Sym{
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syms[i] = Sym{
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Value: f.Entry,
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Type: 'T',
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Name: t.funcName(info.nameoff()),
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GoType: 0,
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Func: f,
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}
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f.Sym = &syms[i]
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}
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return funcs
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}
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