Impact Graph Speedups
Impact Graphs got a nice upgrade today that has resulted in improved render times (except on the very first load after the recent deploy). Once a graph has been generated,…
Impact Graphs got a nice upgrade today that has resulted in improved render times (except on the very first load after the recent deploy). Once a graph has been generated, subsequent pageloads will simply look up the cached data and send that to your browser. If you load the page and the graph is more than a day old, we’ll fire off a background job that will bring it up to date. With the new data available, subsequent loads will show the newest data. Speedy access for all!
You’ll also notice that this means that you can see the Impact Graph for even very large or old repositories like the Rails graph below.

This makes it easy to see how git preserves the author of contributions. Once Rails moved to git and GitHub, their graph explodes with attributed commits. Just another way that git says “I love you.”
Written by
Related posts
GitHub availability report: January 2026
In January, we experienced two incidents that resulted in degraded performance across GitHub services.
Pick your agent: Use Claude and Codex on Agent HQ
Claude by Anthropic and OpenAI Codex are now available in public preview on GitHub and VS Code with a Copilot Pro+ or Copilot Enterprise subscription. Here’s what you need to know and how to get started today.
What the fastest-growing tools reveal about how software is being built
What languages are growing fastest, and why? What about the projects that people are interested in the most? Where are new developers cutting their teeth? Let’s take a look at Octoverse data to find out.