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615a52b95b
When T is a scalar, there are no runtime calls required, which makes this a clear win. encoding/binary: WriteInts-8 958ns ± 3% 864ns ± 2% -9.80% (p=0.000 n=15+15) This also considerably shrinks a core fmt routine: Before: "".(*pp).printArg t=1 size=3952 args=0x20 locals=0xf0 After: "".(*pp).printArg t=1 size=2624 args=0x20 locals=0x98 Unfortunately, I find it very hard to get stable numbers out of the fmt benchmarks due to thermal scaling. Change-Id: I1278006b030253bf8e48dc7631d18985cdaa143d Reviewed-on: https://go-review.googlesource.com/26659 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> Reviewed-by: Keith Randall <khr@golang.org>
68 lines
1.8 KiB
Go
68 lines
1.8 KiB
Go
// errorcheck -0 -d=typeassert
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// Copyright 2015 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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package p
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func assertptr(x interface{}) *int {
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return x.(*int) // ERROR "type assertion inlined"
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}
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func assertptr2(x interface{}) (*int, bool) {
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z, ok := x.(*int) // ERROR "type assertion inlined"
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return z, ok
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}
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func assertfunc(x interface{}) func() {
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return x.(func()) // ERROR "type assertion inlined"
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}
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func assertfunc2(x interface{}) (func(), bool) {
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z, ok := x.(func()) // ERROR "type assertion inlined"
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return z, ok
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}
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// TODO(rsc): struct{*int} is stored directly in the interface
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// and should be possible to fetch back out of the interface,
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// but more of the general data movement code needs to
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// realize that before we can inline the assertion.
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func assertstruct(x interface{}) struct{ *int } {
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return x.(struct{ *int }) // ERROR "type assertion not inlined"
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}
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func assertstruct2(x interface{}) (struct{ *int }, bool) {
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z, ok := x.(struct{ *int }) // ERROR "type assertion not inlined"
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return z, ok
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}
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func assertbig(x interface{}) complex128 {
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return x.(complex128) // ERROR "type assertion not inlined"
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}
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func assertbig2(x interface{}) (complex128, bool) {
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z, ok := x.(complex128) // ERROR "type assertion .scalar result. inlined"
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return z, ok
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}
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func assertbig2ok(x interface{}) (complex128, bool) {
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_, ok := x.(complex128) // ERROR "type assertion [(]ok only[)] inlined"
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return 0, ok
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}
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func assertslice(x interface{}) []int {
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return x.([]int) // ERROR "type assertion not inlined"
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}
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func assertslice2(x interface{}) ([]int, bool) {
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z, ok := x.([]int) // ERROR "type assertion not inlined"
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return z, ok
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}
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func assertslice2ok(x interface{}) ([]int, bool) {
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_, ok := x.([]int) // ERROR "type assertion [(]ok only[)] inlined"
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return nil, ok
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}
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