We often make concurrent requests in treeherder. Instead of running an angular digest cycle after each one returns, we should defer slightly so we can handle a bunch of DOM updates in one shot by setting useApplyAsync on the $httpProvider class. https://docs.angularjs.org/api/ng/provider/$httpProvider

With this change: 1. When loading page first time, go from 1688ms in requestLoaded callback (triggered digest) to 1340msec in deferred digest callback 2. When loading 50 more jobs, go from 2630ms in requestLoaded callback (triggered digest) to 1934msec in deferred digest callback. Also spend 2000msec less in generateJobElements 3. When loading job details, go from 2400msec in requestLoaded callback (triggered digest) to 823msec in deferred digest callback.

This is a great idea! I didn't even know it existed :-)

Commit pushed to master at https://github.com/mozilla/treeherder-ui https://github.com/mozilla/treeherder-ui/commit/ad8a39253a1a79933c374786826a9cd841cb6247 Bug 1158973 - Batch digest updates when http requests return

Yeah it's pretty cool!

FWIW: http://blog.thoughtram.io/angularjs/2015/01/14/exploring-angular-1.3-speed-up-with-applyAsync.html

Commit pushed to master at https://github.com/mozilla/treeherder https://github.com/mozilla/treeherder/commit/3efbfc5f3cd24f6ec738b6b1004ecc21dace3720 Bug 1158973 - Batch digest updates when http requests return