Zig Miniprof

Minimalistic profiler tool for Zig.

How to use

Install

1. Add Miniprof to build.zig.zon dependencies

zig fetch --save https://github.com/milanpoliak/miniprof/archive/refs/tags/v0.1.1.tar.gz

1. Add Miniprof to build.zig

const miniprof = b.dependency("miniprof", .{
    .target = target,
    .optimize = optimize,
});

exe.root_module.addImport("miniprof", miniprof.module("miniprof"));

Run

// Import Miniprof
const profiler = @import("miniprof");
const OpenBlock = profiler.OpenBlock;

const allocator = std.testing.allocator;

// Setup global profiler...
try profiler.setupGlobalProfiler(allocator, 64); // Profilers have capacity, but they use std.ArrayList and can grow when needed
var block = OpenBlock("A block");
defer block.close();

// ... or create a custom instance (e.g. if you need independent profiles for different code paths) 
var prof = try profiler.Profiler.init(allocator, 64);
var block = profiler.OpenBlockWithProfiler("A block", &prof);
defer block.close();

// ... do stuff

// Print results in a table (or use profiler.blocks directly to report it in other formats)
try profiler.writeTable(profiler.GlobalProfiler, std.io.getStdOut().writer(), allocator)

Example table output

Block           Exclusive time  % of total time  Total time  Hits    
---------------------------------------------------------------------
a block         11283703        0.24             9561689374  2       
another block   4661619021      97.51            4769561005  290875 

Disabling profiler

For release builds, or any other situations you want the profiler to be disabled simply import the disabled module in your build.zig. The disabled module exposes all functions with the same signatures, but empty bodies.

exe.root_module.addImport("miniprof", miniprof.module("disabled"));

Known limitations

• Multiple blocks with the same name will be treated as a single block