What do the Snapchat, Airbnb, and Spotify iOS apps have in common? They all use order files to speed up their iOS app launch times.

Order files re-order your binary to improve how symbols are loaded into memory. No code changes are necessary, but generating an optimized order file can be cumbersome, so historically it’s mostly done by larger teams or teams willing to pay for a service.

Now this optimization is free and more accessible than it has ever been.