mirror of
https://github.com/ii64/sonic.git
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64 lines
3 KiB
Cheetah
64 lines
3 KiB
Cheetah
/*
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* Copyright 2021 ByteDance Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package {{PACKAGE}}
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import (
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`math`
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`strconv`
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`testing`
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`github.com/stretchr/testify/assert`
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)
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func TestFastFloat_Encode(t *testing.T) {
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var buf [64]byte
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assert.Equal(t, "0" , string(buf[:__f64toa(&buf[0], 0)]))
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assert.Equal(t, "0" , string(buf[:__f64toa(&buf[0], math.Float64frombits(0x8000000000000000))]))
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assert.Equal(t, "12340000000" , string(buf[:__f64toa(&buf[0], 1234e7)]))
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assert.Equal(t, "12.34" , string(buf[:__f64toa(&buf[0], 1234e-2)]))
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assert.Equal(t, "0.001234" , string(buf[:__f64toa(&buf[0], 1234e-6)]))
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assert.Equal(t, "1e30" , string(buf[:__f64toa(&buf[0], 1e30)]))
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assert.Equal(t, "1.234e33" , string(buf[:__f64toa(&buf[0], 1234e30)]))
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assert.Equal(t, "1.234e308" , string(buf[:__f64toa(&buf[0], 1234e305)]))
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assert.Equal(t, "1.234e-317" , string(buf[:__f64toa(&buf[0], 1234e-320)]))
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assert.Equal(t, "1.7976931348623157e308" , string(buf[:__f64toa(&buf[0], 1.7976931348623157e308)]))
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assert.Equal(t, "-12340000000" , string(buf[:__f64toa(&buf[0], -1234e7)]))
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assert.Equal(t, "-12.34" , string(buf[:__f64toa(&buf[0], -1234e-2)]))
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assert.Equal(t, "-0.001234" , string(buf[:__f64toa(&buf[0], -1234e-6)]))
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assert.Equal(t, "-1e30" , string(buf[:__f64toa(&buf[0], -1e30)]))
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assert.Equal(t, "-1.234e33" , string(buf[:__f64toa(&buf[0], -1234e30)]))
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assert.Equal(t, "-1.234e308" , string(buf[:__f64toa(&buf[0], -1234e305)]))
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assert.Equal(t, "-1.234e-317" , string(buf[:__f64toa(&buf[0], -1234e-320)]))
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assert.Equal(t, "-2.2250738585072014e-308" , string(buf[:__f64toa(&buf[0], -2.2250738585072014e-308)]))
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}
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func BenchmarkFastFloat_Encode(b *testing.B) {
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val := -2.2250738585072014e-308
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benchmarks := []struct {
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name string
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test func(*testing.B)
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}{{
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name: "StdLib",
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test: func(b *testing.B) { var buf [64]byte; for i := 0; i < b.N; i++ { strconv.AppendFloat(buf[:], val, 'g', -1, 64) }},
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}, {
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name: "FastFloat",
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test: func(b *testing.B) { var buf [64]byte; for i := 0; i < b.N; i++ { __f64toa(&buf[0], val) }},
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}}
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for _, bm := range benchmarks {
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b.Run(bm.name, bm.test)
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}
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}
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