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472c792e0a
XPos is a compact (8 instead of 16 bytes on a 64bit machine) source position representation. There is a 1:1 correspondence between each XPos and each regular Pos, translated via a global table. In some sense this brings back the LineHist, though positions can track line and column information; there is a O(1) translation between the representations (no binary search), and the translation is factored out. The size increase with the prior change is brought down again and the compiler speed is in line with the master repo (measured on the same "quiet" machine as for prior change): name old time/op new time/op delta Template 256ms ± 1% 262ms ± 2% ~ (p=0.063 n=5+4) Unicode 132ms ± 1% 135ms ± 2% ~ (p=0.063 n=5+4) GoTypes 891ms ± 1% 871ms ± 1% -2.28% (p=0.016 n=5+4) Compiler 3.84s ± 2% 3.89s ± 2% ~ (p=0.413 n=5+4) MakeBash 47.1s ± 1% 46.2s ± 2% ~ (p=0.095 n=5+5) name old user-ns/op new user-ns/op delta Template 309M ± 1% 314M ± 2% ~ (p=0.111 n=5+4) Unicode 165M ± 1% 172M ± 9% ~ (p=0.151 n=5+5) GoTypes 1.14G ± 2% 1.12G ± 1% ~ (p=0.063 n=5+4) Compiler 5.00G ± 1% 4.96G ± 1% ~ (p=0.286 n=5+4) Change-Id: Icc570cc60ab014d8d9af6976f1f961ab8828cc47 Reviewed-on: https://go-review.googlesource.com/34506 Run-TryBot: Robert Griesemer <gri@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
56 lines
1.2 KiB
Go
56 lines
1.2 KiB
Go
// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build !nacl
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package gc
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import (
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"reflect"
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"testing"
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"unsafe"
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)
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// Assert that the size of important structures do not change unexpectedly.
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func TestSizeof(t *testing.T) {
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const _64bit = unsafe.Sizeof(uintptr(0)) == 8
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var tests = []struct {
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val interface{} // type as a value
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_32bit uintptr // size on 32bit platforms
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_64bit uintptr // size on 64bit platforms
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}{
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{Func{}, 100, 168},
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{Name{}, 44, 72},
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{Param{}, 24, 48},
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{Node{}, 96, 152},
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{Sym{}, 64, 120},
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{Type{}, 64, 104},
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{MapType{}, 20, 40},
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{ForwardType{}, 20, 32},
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{FuncType{}, 28, 48},
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{StructType{}, 12, 24},
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{InterType{}, 4, 8},
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{ChanType{}, 8, 16},
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{ArrayType{}, 16, 24},
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{InterMethType{}, 4, 8},
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{DDDFieldType{}, 4, 8},
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{FuncArgsType{}, 4, 8},
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{ChanArgsType{}, 4, 8},
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{PtrType{}, 4, 8},
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{SliceType{}, 4, 8},
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}
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for _, tt := range tests {
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want := tt._32bit
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if _64bit {
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want = tt._64bit
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}
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got := reflect.TypeOf(tt.val).Size()
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if want != got {
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t.Errorf("unsafe.Sizeof(%T) = %d, want %d", tt.val, got, want)
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}
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}
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}
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