Description

When running Sidequest under Bun instead of Node.js, the worker process crashes immediately with a Not implemented error from Piscina.

This happens because Piscina internally uses Node’s perf_hooks.monitorEventLoopDelay / createHistogram, which are not implemented in Bun’s Node-compatibility layer. As a result, Sidequest cannot currently be used in a Bun runtime.

Error log

[info] [2025-08-18 14:51:46] [Sidequest] [Worker] : Starting worker with provided configuration...
[error] [2025-08-18 14:51:46] [Sidequest] [Worker] : Not implemented
Error: Not implemented
    at unknown
    at new PiscinaHistogramHandler (.../node_modules/piscina/dist/histogram.js:21:94)
    at new ThreadPool (.../node_modules/piscina/dist/index.js:94:30)
    at new Piscina (.../node_modules/piscina/dist/index.js:622:57)
    at new RunnerPool (.../node_modules/@sidequest/engine/dist/shared-runner/runner-pool.js:18:25)
    at new ExecutorManager (.../node_modules/@sidequest/engine/dist/execution/executor-manager.js:25:31)
    at <anonymous> (.../node_modules/@sidequest/engine/dist/workers/main.js:25:151)

Steps to reproduce

1. Install Sidequest in a Bun project
2. Call Sidequest.start() in Bun runtime
3. Worker crashes before starting

Expected behavior

Sidequest should either:

• Support Bun’s runtime

Actual behavior

Worker immediately crashes with PiscinaHistogramHandler: Not implemented.

Environment

• Sidequest version: @sidequest/engine@x.x.x (please fill exact version)
• Bun version: 1.1.x