| """Python script that automates the benchmarking of Go utf8.Valid function over | |
| small inputs. | |
| This script will clone the Go repository, build the Go toolchain, and run the | |
| utf8.Valid benchmarks over small inputs, both on the CL and its parent, and plot | |
| the time per operation. | |
| Requirements: | |
| - Python 3 |
| #include <immintrin.h> | |
| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <string.h> | |
| #include <sys/mman.h> | |
| const char mask_bytes[] = { | |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, | |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, | |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| Hello, world! |
| ;; Display the assembly generated by the Go compiler of the code at current line in an emacs buffer. | |
| ;; | |
| ;; Navigate to a line of go code, then M-x my/go-show-asm. | |
| (defun my/go-show-asm () | |
| (interactive) | |
| (let* ((p (buffer-file-name)) | |
| (out-b "*go-show-asm*") | |
| (needle (concat p ":" (number-to-string (line-number-at-pos))))) | |
| (if (string-suffix-p ".go" p) | |
| (progn |
| // Go AVO code that generates a right shift cross lanes with zeroes fill when offset is known and less than 16 bytes. | |
| Comment("Shift right that works if remaining bytes >= 16") | |
| VPMOVQU(Mem{Base: d}, currentBlockY) | |
| zeroes := YMM() | |
| VPXOR(zeroes, zeroes, zeroes) | |
| src1 := YMM() |
| # Script to generate performance graph for utf8.Valid. | |
| # Takes output of go test -bench as stdin. | |
| # | |
| # make && go test ./utf8 -run=None -bench=BenchmarkValid|tee out.txt | |
| # python plot.py < out.txt | |
| # open data.png | |
| import fileinput | |
| import re |
| // Package document provides tools for manipulating the structure of TOML | |
| // documents. | |
| // | |
| // While github.com/pelletier/go-toml provides efficient functions to transform | |
| // TOML documents to and from usual Go types, this package allows you to create | |
| // and modify the structure of a TOML document. | |
| // | |
| // Comments | |
| // | |
| // Most structural elements of a Document can have comments attached to them. |
| gh issue list --json number,title,body -t "{{range .}} | |
| --- | |
| ## {{.number}} - {{.title}} | |
| {{.body}} | |
| {{end}}"|sed 's/\r//g' > issues.md |
| package main | |
| import ( | |
| "reflect" | |
| "unsafe" | |
| ) | |
| // Safe version to do this. | |
| func ReadOnlyChanFromSlice(s []string) <-chan string { | |
| c := make(chan string, len(s)) |
While benchmarking https://github.com/pelletier/go-toml/tree/v2, I decided to play with CPU frequency scaling, to eliminate some noise in the benchmarks.
Running on the following:
goos: linux
goarch: amd64
cpu: AMD Ryzen 9 5950X 16-Core Processor
kernel: 5.12.8-300.fc34.x86_64