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Go testing frameworks

Going Faster

Article from ADMIN 82/2024

By Federico Lucifredi

Explore the Go language performance framework and thrash the cache in style.

Traditionally the best language to implement command-line interface (CLI) shell utilities in Linux was Perl [1] – primarily because of its large collection of pre-existing modules, a resource unparalleled at the time called CPAN [2]. Things have since changed, with Perl's popularity steadily declining in the eyes of developers and other languages rising to produce comparably large module libraries, as in Python [3] or Node [4].

Recent books have been published about writing shell commands in Rust [5], Python [6], Node.js [7], and even Go [8], and it is into this last language's interesting performance testing facilities I shall delve deeper. Go famously includes a testing framework, but perhaps less well known is its equally impressive built-in performance testing facility.

To start, the directories should be set up as presented in Figure 1, with the project row.go detailed in Listing 1.

Listing 1

row.go

01 package main
02
03 func main() {
04
05     const size = 10
06
07     var array = [size][size]int {{0},{0},}
08
09     for i := 0; i < size; i++ {
10         for j := 0; j < size; j++ {
11             array[i][j]++
12         }
13     }
14
15 }

...

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