GTmetrix adds Test Server Regions and HAR Diff
Adrian Yee
We're pleased to announce two major features that we recently pushed
live onto GTmetrix:
* Test Server Regions
* HAR Diff - visual diff for HAR files
Test Server Regions
In addition to our main test server in Vancouver, Canada, you can now
test your URL in Dallas, USA, London, UK, and Sydney, Australia. Like
the other test options, log in to access this new functionality.
Compare URLs in different regions to see the difference in geo-targeted
content, CDN performance and load times. Page Speed and YSlow scores
shouldn't change too much, but your page load times and waterfall graphs
should.
HAR Diff
We've always wanted a way to easily compare the differences between two
HAR files and now it's possible with HAR Diff! We've made an add-on to
Jan Odvarko's HAR Viewer
(http://www.softwareishard.com/blog/har-viewer/) that allows you to
compare two waterfall graphs side-by-side.
You can see it in action here (be sure to view the larger version of it):
http://gtmetrix.com/compare/kkJrvNPv/jFNfForA/#report-timeline
This visual comparison can help highlight differences between two
waterfalls such as:
* The impact of latency on your pages and its resources from different
locations
* Geo-targeted content
* Optimizations performed (eg. minified and combined files)
* Differences in browser loading
We have submitted some patches to the HAR Viewer project (which have
already been accepted) and we're getting the rest of the HAR Diff code
ready for release (it will be an open source add-on) so you can also add
HAR Diffs to your project too!
We would love to hear feedback from the community on HAR Diff so that we
can make it even better.
You can read more about HAR Diff here: http://gtmetrix.com/changes.html
Adrian