parallel

Documentation

Overview

Package parallel splits row-oriented pixel work across goroutines. Every split partitions the output into disjoint, fixed row bands so results never depend on goroutine scheduling order, which is what keeps rendering deterministic across runs.

Index

• Constants
• func Rows(height int, fn func(lo, hi int))

Constants

const MinRowsPerGoroutine = 16

MinRowsPerGoroutine is the smallest band worth spawning a goroutine for. Below this the coordination overhead outweighs the parallelism

Functions

func Rows

func Rows(height int, fn func(lo, hi int))

Rows runs fn over contiguous row bands covering [0,height), in parallel when the work is large enough. fn receives a half-open range [lo,hi) and must only write rows inside that range so the bands stay independent.