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package bigfft
import (
"math/big"
"testing"
"time"
)
func TestScan(t *testing.T) {
for size := 10; size <= 1e5; size += 191 {
s := rndStr(size)
x, ok := new(big.Int).SetString(s, 10)
if !ok {
t.Fatal("cannot parse", s)
}
t0 := time.Now()
y := FromDecimalString(s)
if x.Cmp(y) != 0 {
t.Errorf("failed at size %d", size)
} else {
t.Logf("OK for size %d in %s", size, time.Since(t0))
}
}
}
func BenchmarkScanFast1k(b *testing.B) { benchmarkScanFast(1e3, b) }
func BenchmarkScanFast10k(b *testing.B) { benchmarkScanFast(10e3, b) }
func BenchmarkScanFast100k(b *testing.B) { benchmarkScanFast(100e3, b) }
func BenchmarkScanFast1M(b *testing.B) { benchmarkScanFast(1e6, b) }
func BenchmarkScanFast2M(b *testing.B) { benchmarkScanFast(2e6, b) }
func BenchmarkScanFast5M(b *testing.B) { benchmarkScanFast(5e6, b) }
func BenchmarkScanFast10M(b *testing.B) { benchmarkScanFast(10e6, b) }
//func BenchmarkScanFast100M(b *testing.B) { benchmarkScanFast(100e6, b) }
func benchmarkScanFast(n int, b *testing.B) {
s := rndStr(n)
var x *big.Int
for i := 0; i < b.N; i++ {
x = FromDecimalString(s)
}
_ = x
}
func BenchmarkScanBig1k(b *testing.B) { benchmarkScanBig(1e3, b) }
func BenchmarkScanBig10k(b *testing.B) { benchmarkScanBig(10e3, b) }
func BenchmarkScanBig100k(b *testing.B) { benchmarkScanBig(100e3, b) }
func BenchmarkScanBig1M(b *testing.B) { benchmarkScanBig(1e6, b) }
func BenchmarkScanBig2M(b *testing.B) { benchmarkScanBig(2e6, b) }
func BenchmarkScanBig5M(b *testing.B) { benchmarkScanBig(5e6, b) }
func BenchmarkScanBig10M(b *testing.B) { benchmarkScanBig(10e6, b) }
func benchmarkScanBig(n int, b *testing.B) {
s := rndStr(n)
var x big.Int
for i := 0; i < b.N; i++ {
x.SetString(s, 10)
}
}
func rndStr(n int) string {
x := make([]byte, n)
for i := 0; i < n; i++ {
x[i] = '0' + byte(rnd.Intn(10))
}
return string(x)
}
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