February 25, 2025 - Raw benchmark numbers can be difficult to interpret, especially when comparing different implementations or tracking performance changes over time. The benchstat tool, part of the Go erformance measurement toolkit, applies statistical analysis to benchmark results to provide more meaningful comparisons. ... goos: linux goarch: amd64 pkg: github.com/betterstack-community/golang-benchmarks cpu: 11th Gen Intel(R) Core(TM) i7-11850H @ 2.50GHz │ old.txt │ new.txt │ │ sec/op │ sec/op vs base │ JoinStrings-16 74.27n ± 15% 73.98n ± 11% ~ (p=0.684 n=10)

The Go project monitors the performance characteristics of the Go implementation as well as that of subrepositories like golang.org/x/tools. golang.org/x/benchmarks/cmd/bench is the entrypoint for our performance tests.

June 4, 2024 - A benchmark is a type of function that executes a code segment multiple times and compares each output against a standard, assessing the code’s overall performance level. Golang includes built-in tools for writing benchmarks in the testing package and the go tool, so you can write useful benchmarks without installing any dependencies.

June 30, 2013 - The Go testing package contains a benchmarking facility that can be used to examine the performance of your Go code.

There are standard tools for working with benchmark results at golang.org/x/perf/cmd. In particular, golang.org/x/perf/cmd/benchstat performs statistically robust A/B comparisons.

This subrepository holds macro-benchmarks used for Go performance development and monitoring. Each benchmark is compiled into a separate binary. To build and install them all in the current directory, execute: $ GOBIN=$PWD go get golang.org...

April 2, 2025 - Go 1.24 introduces a new way to write benchmarks that’s just as easy to use, but at the same time far more robust: testing.B.Loop.

This function takes as parameter a pointer to a type struct testing.B . This type struct has only one property exported: N. Which represents the number of iterations to run. The benchmark will not just run the function one time but several time to gather reliable data about the execution of ...

-benchmem goos: darwin goarch: arm64 pkg: github.com/SimonWaldherr/golang-benchmarks/random cpu: Apple M2 Max BenchmarkMathRand-12 173850315 6.788 ns/op 0 B/op 0 allocs/op BenchmarkCryptoRand-12 9600194 119.7 ns/op 48 B/op 3 allocs/op BenchmarkCryptoRandString-12 10630824 109.9 ns/op 128 B/op 3 allocs/op BenchmarkCryptoRandBytes-12 20621996 58.74 ns/op 32 B/op 1 allocs/op PASS ok github.com/SimonWaldherr/golang-benchmarks/random 5.830s · // Package regexp benchmarks the performance of a pre-compiled regexp match // a non-pre-compiled match and JIT-cached-compilation via golibs: https://simonw

Unit testing is an important part of writing principled Go programs. The testing package provides the tools we need to write unit tests and the go test command runs tests · For the sake of demonstration, this code is in package main, but it could be any package.

January 29, 2025 - Profiling and benchmarking are essential techniques for optimizing performance in Golang. By regularly using tools like pprof and testing.B, you can pinpoint performance bottlenecks and make informed optimizations.

October 25, 2024 - Learn how to write benchmarks and measure execution time and memory allactions of your code.

September 23, 2024 - In Go, benchmark tests are used to measure the performance (speed and memory usage) of functions or blocks of code. These tests are part of the Go testing framework and are written in the same files as unit tests, but they are specifically for ...

February 10, 2018 - Elliots-MBP:go-testing-tutorial elliot$ go test -bench=. goos: darwin goarch: amd64 BenchmarkCalculate-8 2000000000 0.30 ns/op PASS ok _/Users/elliot/Documents/Projects/tutorials/golang/go-testing-tutorial 0.643s

May 9, 2025 - Go’s built-in map is lightning fast, but it’s not safe for concurrent writes. Enter sync.Map—but does thread-safety cost us performance? 📌 Benchmark Scenario: Reading/Writing 1 million keys concurrently.

January 22, 2023 - Benchmark tables are a way to compare the performance of different implementations of the same function. To create a benchmark table, use the testing.B’s Run method. The Run method takes a string and a function as arguments.

These are benchmarks collected from the community used to measure the effects of changes to the Go core (compiler, runtime, garbage collector, and libraries).

April 27, 2023 - Let’s go ahead and run the benchmarks with -count 10 and -count 20 to compare the performance: go test -bench . -benchmem -count 10 > 10_runs_bench.txt go test -bench . -benchmem -count 20 > 20_runs_bench.txt · Now you have the results from two sets of benchmarks with 10 and 20 runs each. To compare these results, you can use benchstat, a command-line tool that helps analyze and compare benchmark results: go install golang.org/x/perf/cmd/benchstat@latest ·

May 19, 2024 - In this post I will introduce the benchmark testing option in Go.

January 27, 2025 - A good starting point is Dave Cheney's article: https://dave.cheney.net/high-performance-go-workshop/gophercon-2019.html · francoposadotio · • 1y ago · Which flaws? The benchmark is one line long and looks identical to the ones in your linked article. More replies · Is golang really that bad?