​​quicklink - (★ 2,981) is faster subsequent page-loads by prefetching in-viewport links during idle time.

Quicklink attempts to make navigations to subsequent pages load faster. It:

● Detects links within the viewport (using Intersection Observer)
● Waits until the browser is idle (using requestIdleCallback)
● Checks if the user isn't on a slow connection (using navigator.connection.effectiveType) or has data-saver enabled (using navigator.connection.saveData)
● Prefetches URLs to the links (using <link rel=prefetch> or XHR). Provides some control over the request priority (can switch to fetch() if supported).

#js #performance #labs

​​Vegeta - (★ 12,678) is a versatile HTTP load testing tool built out of a need to drill HTTP services with a constant request rate. It can be used both as a command line utility and a library.

#load #testing #performance

​​samply - (★ 2.4k) is the command-line sampling profiler for macOS and Linux, which uses the Firefox profiler as its UI.
If you want to profile the execution of, say, ./my-application program, run it with the following command:

samply record ./my-application my-arguments

Here is an example of the output.

#profiling #performance #rust