Function BenchmarkBuffered

log/buffered_test.go:27–59

BenchmarkBuffered creates buffered loggers of various capacities to see which perform best.

(b *testing.B)

// BenchmarkBuffered creates buffered loggers of various capacities to see which perform best.
func BenchmarkBuffered(b *testing.B) {
	for i := 1; i <= 2048; i *= 2 {
		f := outFile(b)

		bufLog := NewBufferedLogger(f, uint32(i),
			WithFlushPeriod(flushPeriod),
			WithPrellocatedBuffer(bufferSize),
		)
		l := log.NewLogfmtLogger(bufLog)

		b.Run(fmt.Sprintf("capacity:%d", i), func(b *testing.B) {
			b.ReportAllocs()
			b.StartTimer()

			require.NoError(b, f.Truncate(0))

			logger := log.With(l, "common_key", "common_value")
			for j := 0; j < b.N; j++ {
				logger.Log("foo_key", "foo_value")
			}

			// force a final flush for outstanding lines in buffer
			bufLog.Flush()
			b.StopTimer()

			contents, err := os.ReadFile(f.Name())
			require.NoErrorf(b, err, "could not read test file: %s", f.Name())

			lines := strings.Split(string(contents), "\n")
			require.Len(b, lines, b.N+1)
		})
	}
}

// BenchmarkUnbuffered should perform roughly equivalently to a buffered logger with a capacity of 1.
func BenchmarkUnbuffered(b *testing.B) {