geeTestSolver/solve_benchmark_test.go at master · tjaycodes4you/geeTestSolver · GitHub

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package main

import (
	"image"
	_ "image/png"
	"os"
	"testing"
	"time"
)

// BenchmarkSolve benchmarks the Solve function with bg-1.png and slice-1.png
func BenchmarkSolve(b *testing.B) {
	// Load images once
	bgFile, err := os.Open("bg-1.png")
	if err != nil {
		b.Fatalf("Failed to open bg-1.png: %v", err)
	}
	defer bgFile.Close()

	sliceFile, err := os.Open("slice-1.png")
	if err != nil {
		b.Fatalf("Failed to open slice-1.png: %v", err)
	}
	defer sliceFile.Close()

	bgImg, _, err := image.Decode(bgFile)
	if err != nil {
		b.Fatalf("Failed to decode bg-1.png: %v", err)
	}

	sliceImg, _, err := image.Decode(sliceFile)
	if err != nil {
		b.Fatalf("Failed to decode slice-1.png: %v", err)
	}

	// Reset timer and run benchmark
	b.ResetTimer()

	for i := 0; i < b.N; i++ {
		pos, score, err := Solve(bgImg, sliceImg)
		if err != nil {
			b.Fatalf("Solve failed: %v", err)
		}
		// Use the results to prevent optimization
		_ = pos
		_ = score
	}
}

// BenchmarkSolveWithTime measures execution time with detailed timing info
func BenchmarkSolveWithTime(b *testing.B) {
	// Load images once
	bgFile, err := os.Open("bg-1.png")
	if err != nil {
		b.Fatalf("Failed to open bg-1.png: %v", err)
	}
	defer bgFile.Close()

	sliceFile, err := os.Open("slice-1.png")
	if err != nil {
		b.Fatalf("Failed to open slice-1.png: %v", err)
	}
	defer sliceFile.Close()

	bgImg, _, err := image.Decode(bgFile)
	if err != nil {
		b.Fatalf("Failed to decode bg-1.png: %v", err)
	}

	sliceImg, _, err := image.Decode(sliceFile)
	if err != nil {
		b.Fatalf("Failed to decode slice-1.png: %v", err)
	}

	// Measure single run with high precision
	b.ResetTimer()
	start := time.Now()

	pos, score, err := Solve(bgImg, sliceImg)
	if err != nil {
		b.Fatalf("Solve failed: %v", err)
	}

	elapsed := time.Since(start)

	b.ReportMetric(float64(elapsed.Nanoseconds()), "ns/op")
	b.ReportMetric(float64(elapsed.Milliseconds()), "ms/op")
	b.ReportAllocs()

	_ = pos
	_ = score
}