57 lines
2.0 KiB
Go
57 lines
2.0 KiB
Go
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package basic
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import (
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"testing"
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)
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// 这些基准是"性能不回退"的度量口径：Nutation2000B 有界记忆表、升落上下文 stateAt 的分配、
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// 以及两条真实调用链（月球升落、掩星升落回归）。改动这些热路径后请对比 benchmark 数字。
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// These benchmarks are the regression yardstick for the hot paths changed here: the bounded
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// Nutation2000B memo, the allocation behaviour of the rise/set context stateAt, and two real call
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// chains (moon rise/set and the occultation rise/set regression case). Compare before/after numbers
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// whenever those paths change.
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func BenchmarkNutation2000B(b *testing.B) {
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b.ReportAllocs()
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for i := 0; i < b.N; i++ {
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_, _ = Nutation2000B(2460310.5 + float64(i%97)*0.37)
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}
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}
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func BenchmarkTrueObliquity(b *testing.B) {
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b.ReportAllocs()
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for i := 0; i < b.N; i++ {
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_ = TrueObliquity(2460310.5 + float64(i%97)*0.37)
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}
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}
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var benchMoonRise, benchMoonSet float64
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func BenchmarkMoonRiseSetChain(b *testing.B) {
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jd := JDECalc(2023, 6, 21)
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b.ReportAllocs()
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for i := 0; i < b.N; i++ {
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benchMoonRise, _ = GetMoonRiseTime(jd, 116.4074, 39.9042, 8, 1, 0)
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benchMoonSet, _ = GetMoonSetTime(jd, 116.4074, 39.9042, 8, 1, 0)
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}
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}
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// Nutation2000B 有界记忆表：重复瞬时必须命中且数值逐位不变。
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func TestNutationMemoHitsRepeatedInstants(t *testing.T) {
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resetNutationMemo()
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const jd = 2460310.5
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firstPsi, firstEps := Nutation2000B(jd)
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secondPsi, secondEps := Nutation2000B(jd)
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if firstPsi != secondPsi || firstEps != secondEps {
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t.Fatalf("memo changed the value: (%v,%v) vs (%v,%v)", firstPsi, firstEps, secondPsi, secondEps)
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}
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hits, misses := nutationMemoStats()
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if hits == 0 || misses == 0 {
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t.Fatalf("expected one miss and at least one hit, got hits=%d misses=%d", hits, misses)
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}
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// 与未走记忆表的实现逐位一致。
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directPsi, directEps := nutation2000BCompute(jd)
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if firstPsi != directPsi || firstEps != directEps {
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t.Fatalf("memoized value differs from direct computation")
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}
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}
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