Search code examples
javascriptnpmchromiumbenchmarking

Why require("perf_hooks") fails?

In my understanding "perf_hooks" is a part of Node.js. However when testing with npm test it fails for me with the following (some filenames are changed):

Error: ENOENT: no such file or directory, open 'perf_hooks'
      at Object.openSync (fs.js:465:3)
      at Object.readFileSync (fs.js:368:35)
      at SandboxedModule._getCompileInfo (node_modules/sandboxed-module/lib/sandboxed_module.js:265:20)
      at SandboxedModule._compile (node_modules/sandboxed-module/lib/sandboxed_module.js:245:22)
      at createInnerSandboxedModule (node_modules/sandboxed-module/lib/sandboxed_module.js:183:23)
      at SandboxedModule.RecursiveRequireProxy (node_modules/sandboxed-module/lib/sandboxed_module.js:214:27)
      at /Users/asmirnov/Documents/blabla2.js:51:12
      at Object.<anonymous> (lib/profiler.js:53:3)
      at SandboxedModule._compile (node_modules/sandboxed-module/lib/sandboxed_module.js:251:19)
      at createInnerSandboxedModule (node_modules/sandboxed-module/lib/sandboxed_module.js:183:23)
      at SandboxedModule.RecursiveRequireProxy (node_modules/sandboxed-module/lib/sandboxed_module.js:214:27)
      at Object.<anonymous> (lib/blabla1.js:29:20)
      at SandboxedModule._compile (node_modules/sandboxed-module/lib/sandboxed_module.js:251:19)
      at createInnerSandboxedModule (node_modules/sandboxed-module/lib/sandboxed_module.js:183:23)
      at SandboxedModule.RecursiveRequireProxy (node_modules/sandboxed-module/lib/sandboxed_module.js:214:27)
      at SandboxedModule.requireInterceptor (node_modules/sandboxed-module/lib/sandboxed_module.js:227:9)
      at Context.<anonymous> (test/blabla1.js:73:22)
      at processImmediate (internal/timers.js:458:21)

This is a part of the file (lib/profiler.js) that uses it:

const {performance, PerformanceObserver} = (function()
{
  try
  {
    if (window && typeof window.performance == "undefined")
      throw new TypeError();
    return window;
  }
  catch (e)
  {
    return require("perf_hooks");
  }
})();

What can be a reason? However in some scenarios (npm run ..) it works as expected. Any suggestions are appreciated.

PS. Node is relatively fresh:

> node --version
v14.8.0
Solution

  • That's a "sandboxed-module" 2.0.3 issue that was fixed in 2.0.4.