[rtomayko]

I'm a developer at GitHub.

This is a really good writeup and touches on many of the frontend issues we've had our eye on for a while. In fact, the <script> related bits are already dated. We've just rolled out defer support for these for instance.

I really liked the wrap up section on choosing which aspects of performance to concentrate on and can maybe answer some questions here:

> Yet, I am wondering what would be the performance business > case for GitHub? Even if GitHub does not feel slow, faster > is always better.

We want GitHub to be insanely fast and are pouring a significant amount of time and energy into this. We think it's more important than a lot of feature-type additions we also have planned.

(I also left a similar comment on JP's blog that's waiting for moderation.)

[xpose2000]

In reference to the Gravatar icons in the post. You guys are always asking for the 140x140 sized icons and they are then re-sized to 20x20 or 30x30. You have the ability to ask for the gravatar icons in your specified format, which will save a lot of bandwidth.

https://secure.gravatar.com/avatar/e7e8748f7897c2d9a3da0afe4... 32kb

vs

https://secure.gravatar.com/avatar/e7e8748f7897c2d9a3da0afe4... 2.71kb

Making this one change alone will make a huge difference.

[jphpsf]

That is a great tip. Thank you! I just mentioned it in the comment thread of the blog post.

JP