The build broke. Nobody knew why.
Five minutes earlier, it worked. Five minutes later, every git checkout slowed to a crawl. The culprit wasn’t the repository, the network, or the code. It was Zscaler.
When working with large repos, speed matters. Engineers expect git checkout to switch branches instantly. But with Zscaler inspecting traffic, even local Git commands can hang. This often happens because Zscaler’s SSL inspection hooks into system calls and injects latency into operations that touch remote origins or validate certificates. On slower systems or massive repos, that extra friction turns seconds into minutes.
The fix starts with knowing where the slowdown happens. Run the checkout with GIT_CURL_VERBOSE=1 or profile the operation with GIT_TRACE=1 to see if remote calls are triggered. You may find that even switching branches without network calls still interacts with background processes that Zscaler monitors. This is why disconnecting from Zscaler or adding Git domains to its bypass list instantly speeds things up.
For teams, the challenge is balancing security with productivity. Some developers bypass Zscaler on trusted networks, others isolate Git traffic. The cleanest solution is to maintain a developer-friendly rule set in Zscaler that excludes Git operations from deep inspection while keeping everything else secure. It’s worth working with your IT admins to whitelist GitHub, GitLab, and internally hosted repos.
When git checkout works as intended, context switching is frictionless. That flow is where creativity and focus live. And the fewer seconds wasted waiting on a security proxy, the more time engineers spend shipping actual features.
If your git checkout is slow because of Zscaler, fix it now. If you want to experience how fast branch switching and deploy previews can feel without touching your network settings, spin up a live environment on hoop.dev and see it in minutes.