feat: 完善日月食与月掩几何链路并扩展历法接口
- 新增日月食中心带、偏食带、阴影足迹、等时线、食分线及升落边界计算，支持极区与混合食拓扑 - 新增日食单时刻阴影求解器、站心状态查询、批量采样和 ΔT 覆盖接口 - 重构恒星与行星月掩路径，补充有限盘面接触、站心修正、掩带宽度、极区投影及升落边界 - 扩展 SVG 与 GeoJSON 输出，支持详细面板、全球/极区/地球投影、边界闭合、时间标记和拓扑签名 - 扩展日月食候选搜索、局地搜索、沙罗序列预计算与范围外推，补充系列锚点和成员一致性校验 - 补齐古历纪年、儒略历独有闰日、多公历候选、历法改革跨日及精确日期运算接口 - 优化 ΔT、章动、恒星时、月球地平线、事件根搜索和本地星历缓存，降低重复计算开销并提升边界稳定
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package svg
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import (
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"testing"
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"time"
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"b612.me/astro/moon"
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)
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func BenchmarkStarOccultationSVGHR4799(b *testing.B) {
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path := starOccultationSimplificationPath(b)
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for _, tolerance := range []float64{0, occultationGeometryTolerancePixels} {
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b.Run(occultationBenchmarkToleranceName(tolerance), func(b *testing.B) {
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occultationBenchmarkRender(b, tolerance, func() (string, error) {
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return StarOccultationPathSVG(path, StarOccultationSVGOptions{Width: 720, Height: 520})
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}, "occultation-band")
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})
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}
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}
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func BenchmarkPlanetOccultationSVGSaturn20240725(b *testing.B) {
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zone := time.FixedZone("UTC+8", 8*60*60)
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start := time.Date(2024, time.July, 25, 0, 0, 0, 0, zone)
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paths, err := moon.FindPlanetOccultationPaths(
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start, start.Add(24*time.Hour), moon.OccultationSaturn,
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moon.OccultationPathOptions{Step: 5 * time.Minute, TargetSpacingKM: 200},
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)
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if err != nil || len(paths) != 1 {
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b.Fatalf("FindPlanetOccultationPaths() paths=%d err=%v, want one", len(paths), err)
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}
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path := paths[0]
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for _, tolerance := range []float64{0, occultationGeometryTolerancePixels} {
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b.Run(occultationBenchmarkToleranceName(tolerance), func(b *testing.B) {
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occultationBenchmarkRender(b, tolerance, func() (string, error) {
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return PlanetOccultationPathSVG(path, PlanetOccultationSVGOptions{Width: 1200, Height: 800})
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}, "occultation-band")
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})
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}
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}
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func occultationBenchmarkToleranceName(tolerance float64) string {
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if tolerance <= 0 {
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return "unsimplified"
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}
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return "simplified"
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}
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func occultationBenchmarkRender(
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b *testing.B,
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tolerance float64,
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render func() (string, error),
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className string,
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) {
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b.Helper()
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previous := occultationGeometryTolerancePixels
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occultationGeometryTolerancePixels = tolerance
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defer func() { occultationGeometryTolerancePixels = previous }()
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diagram, err := render()
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if err != nil {
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b.Fatalf("render: %v", err)
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}
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b.ReportMetric(float64(len(diagram)), "doc-bytes")
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b.ReportMetric(float64(occultationPathVertexCount(planetOccultationSVGPathData(b, diagram, className))), "band-vertices")
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b.ResetTimer()
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for attempt := 0; attempt < b.N; attempt++ {
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if _, err := render(); err != nil {
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b.Fatalf("render: %v", err)
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}
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}
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}
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// BenchmarkStarOccultationSimplificationSpeedup 在同一次基准里测原始与简化两档容差，
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// 把渲染耗时对比从单元测试移到基准，并直接报告加速比。
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func BenchmarkStarOccultationSimplificationSpeedup(b *testing.B) {
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path := starOccultationSimplificationPath(b)
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render := func() (string, error) {
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return StarOccultationPathSVG(path, StarOccultationSVGOptions{Width: 720, Height: 520})
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}
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raw := occultationBenchmarkDuration(b, 0, render)
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simplified := occultationBenchmarkDuration(b, occultationGeometryTolerancePixels, render)
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b.ReportMetric(float64(raw.Nanoseconds()), "raw-ns/op")
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b.ReportMetric(float64(simplified.Nanoseconds()), "simplified-ns/op")
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b.ReportMetric(float64(raw)/float64(simplified), "speedup")
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}
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// BenchmarkPlanetOccultationSimplificationSpeedup 是行星路径的同一对比。
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func BenchmarkPlanetOccultationSimplificationSpeedup(b *testing.B) {
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zone := time.FixedZone("UTC+8", 8*60*60)
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start := time.Date(2024, time.July, 25, 0, 0, 0, 0, zone)
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paths, err := moon.FindPlanetOccultationPaths(
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start, start.Add(24*time.Hour), moon.OccultationSaturn,
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moon.OccultationPathOptions{Step: 5 * time.Minute, TargetSpacingKM: 200},
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)
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if err != nil || len(paths) != 1 {
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b.Fatalf("FindPlanetOccultationPaths() paths=%d err=%v, want one", len(paths), err)
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}
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path := paths[0]
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render := func() (string, error) {
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return PlanetOccultationPathSVG(path, PlanetOccultationSVGOptions{Width: 1200, Height: 800})
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}
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raw := occultationBenchmarkDuration(b, 0, render)
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simplified := occultationBenchmarkDuration(b, occultationGeometryTolerancePixels, render)
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b.ReportMetric(float64(raw.Nanoseconds()), "raw-ns/op")
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b.ReportMetric(float64(simplified.Nanoseconds()), "simplified-ns/op")
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b.ReportMetric(float64(raw)/float64(simplified), "speedup")
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}
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func occultationBenchmarkDuration(b *testing.B, tolerance float64, render func() (string, error)) time.Duration {
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b.Helper()
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previous := occultationGeometryTolerancePixels
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occultationGeometryTolerancePixels = tolerance
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defer func() { occultationGeometryTolerancePixels = previous }()
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begin := time.Now()
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for attempt := 0; attempt < b.N; attempt++ {
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if _, err := render(); err != nil {
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b.Fatalf("render: %v", err)
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}
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}
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return time.Since(begin) / time.Duration(b.N)
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}
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// BenchmarkPlanetOccultationSVGFootprintBands 对比 DisableFootprints 两档：
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// 逐条绘制密集瞬时足迹 vs 绘制紧凑带的合并结果（命中只读缓存）。
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func BenchmarkPlanetOccultationSVGFootprintBands(b *testing.B) {
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start := time.Date(2024, time.July, 25, 0, 0, 0, 0, time.FixedZone("UTC+8", 8*60*60))
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for _, disable := range []bool{false, true} {
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name := "dense-footprints"
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if disable {
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name = "compact-band"
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}
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b.Run(name, func(b *testing.B) {
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paths, err := moon.FindPlanetOccultationPaths(
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start, start.Add(24*time.Hour), moon.OccultationSaturn,
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moon.OccultationPathOptions{Step: 5 * time.Minute, TargetSpacingKM: 200, DisableFootprints: disable},
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)
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if err != nil || len(paths) != 1 {
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b.Fatalf("FindPlanetOccultationPaths() paths=%d err=%v, want one", len(paths), err)
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}
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path := paths[0]
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render := func() (string, error) {
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return PlanetOccultationPathSVG(path, PlanetOccultationSVGOptions{Width: 1200, Height: 800})
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}
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if _, err := render(); err != nil {
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b.Fatalf("warm-up render: %v", err)
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}
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b.ResetTimer()
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for attempt := 0; attempt < b.N; attempt++ {
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if _, err := render(); err != nil {
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b.Fatalf("render: %v", err)
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}
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}
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})
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}
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}
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// BenchmarkPlanetOccultationSVGCompactBandCold 是紧凑带合并缓存未命中时的成本，
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// 用于说明首次渲染仍要付出一次合并代价。
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func BenchmarkPlanetOccultationSVGCompactBandCold(b *testing.B) {
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start := time.Date(2024, time.July, 25, 0, 0, 0, 0, time.FixedZone("UTC+8", 8*60*60))
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paths, err := moon.FindPlanetOccultationPaths(
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start, start.Add(24*time.Hour), moon.OccultationSaturn,
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moon.OccultationPathOptions{Step: 5 * time.Minute, TargetSpacingKM: 200, DisableFootprints: true},
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)
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if err != nil || len(paths) != 1 {
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b.Fatalf("FindPlanetOccultationPaths() paths=%d err=%v, want one", len(paths), err)
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}
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path := paths[0]
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b.ResetTimer()
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for attempt := 0; attempt < b.N; attempt++ {
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occultationBandCache.Lock()
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occultationBandCache.entries = make(map[occultationBandCacheKey]occultationBandPolygons, occultationBandCacheCapacity)
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occultationBandCache.order = nil
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occultationBandCache.Unlock()
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if _, err := PlanetOccultationPathSVG(path, PlanetOccultationSVGOptions{Width: 1200, Height: 800}); err != nil {
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b.Fatalf("render: %v", err)
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}
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}
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}
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