Filippo Valsorda
477a5b4c32
The "buf points into storage" pattern is nice, but causes the whole state struct to escape, since escape analysis can't track the pointer once it's assigned to buf. Change-Id: I31c0e83f946d66bedb5a180e96ab5d5e936eb322 Reviewed-on: https://go-review.googlesource.com/c/crypto/+/544817 Reviewed-by: Cherry Mui <cherryyz@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Roland Shoemaker <roland@golang.org> Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com> Auto-Submit: Filippo Valsorda <filippo@golang.org>
54 lines
1.1 KiB
Go
54 lines
1.1 KiB
Go
// Copyright 2023 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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//go:build !noopt
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package sha3_test
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import (
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"testing"
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"golang.org/x/crypto/sha3"
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)
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var sink byte
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func TestAllocations(t *testing.T) {
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t.Run("New", func(t *testing.T) {
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if allocs := testing.AllocsPerRun(10, func() {
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h := sha3.New256()
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b := []byte("ABC")
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h.Write(b)
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out := make([]byte, 0, 32)
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out = h.Sum(out)
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sink ^= out[0]
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}); allocs > 0 {
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t.Errorf("expected zero allocations, got %0.1f", allocs)
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}
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})
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t.Run("NewShake", func(t *testing.T) {
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if allocs := testing.AllocsPerRun(10, func() {
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h := sha3.NewShake128()
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b := []byte("ABC")
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h.Write(b)
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out := make([]byte, 0, 32)
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out = h.Sum(out)
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sink ^= out[0]
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h.Read(out)
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sink ^= out[0]
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}); allocs > 0 {
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t.Errorf("expected zero allocations, got %0.1f", allocs)
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}
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})
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t.Run("Sum", func(t *testing.T) {
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if allocs := testing.AllocsPerRun(10, func() {
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b := []byte("ABC")
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out := sha3.Sum256(b)
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sink ^= out[0]
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}); allocs > 0 {
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t.Errorf("expected zero allocations, got %0.1f", allocs)
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}
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})
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}
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