Twitter announced today that its Web site is getting new enhancements geared toward being "optimized for speed." Besides getting rid of the hashbang (#!) in URLs, the social network is also focusing on reducing the "time to first Tweet" and ensuring only what's necessary will load with each Web page.
"To improve the twitter.com experience for everyone, we've been working to take back control of our front-end performance by moving the rendering to the server," Twitter engineering manager Dan Webb wrote in a blog post. "This has allowed us to drop our initial page load times to 1/5th of what they were previously and reduce differences in performance across browsers."
To solve this problem Twitter engineers are focusing on three specific components aiming to get the Website running as fast as possible and to develop new features in the future.
Here's some of what Webb wrote in the blog post:
No more #!
The first thing that you might notice is that permalink URLs are now simpler: they no longer use the hashbang (#!). While hashbang-style URLs have a handful of limitations, our primary reason for this change is to improve initial page-load performance.
Reducing time to first tweet
Before starting any of this work we added instrumentation to find the performance pain points and identify which categories of users we could serve better. The most important metric we used was "time to first Tweet". This is a measurement we took from a sample of users, (using the Navigation Timing API) of the amount of time it takes from navigation (clicking the link) to viewing the first Tweet on each page's timeline. The metric gives us a good idea of how snappy the site feels.
Loading only what we need
Starting this week, the Tweet permalink page will display the new re-architected makeover and the rest of the new framework will be rolled out on the site in the next few weeks.