41 lines
1.2 KiB
Go
41 lines
1.2 KiB
Go
package stats
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import (
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"math"
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"testing"
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"salty/terrain/internal/field"
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)
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// The whole reason this package was rewritten: the sorts could not be afforded at planet scale. 3000 x 3000
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// is about what region 12 of the 100 km template is - 9 M cells, the largest single landmass - so this is the
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// cost of the biggest piece a bake ever hands over, and the planet is the sum of twenty of them.
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//
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// A benchmark rather than a test: it measures rather than asserts, and nothing here should fail a build.
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//
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// go test ./internal/stats/ -bench Region -benchtime 1x
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func BenchmarkRegionSizedAccumulate(b *testing.B) {
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const w, h, cellM = 3000, 3000, 8.0
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f := field.New(w, h, cellM)
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land := make([]bool, w*h)
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up := make([]float32, w*h)
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for y := 0; y < h; y++ {
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for x := 0; x < w; x++ {
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i := y*w + x
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land[i] = true
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t := float64(x) / float64(w)
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f.Data[i] = float32(40 + 300*t*t + 18*math.Sin(float64(x)/9)*math.Cos(float64(y)/7))
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up[i] = float32((0.02 + 0.9*t*t*t) / 1000)
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}
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}
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in := Input{H: f, Land: land, UpliftMYr: up}
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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a := New(testOptions())
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a.Add(in)
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a.AddExtent(f.Data, land, 0)
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_ = a.Report(cellM)
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}
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b.ReportMetric(float64(w*h)/1e6, "Mcells")
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}
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