Performance4 min read
Why Downloads Or Signing Can Feel Slow
The delay is usually not random. Large IPA size, remote storage fetch time, queueing, certificate prep, and repackaging all contribute to the final wait.
Certify Team • 2026-03-22 • Performance
1
The app has to move around
If the original IPA lives in remote storage, the server must download it first, then produce a new signed build, and then host that build for installation.
2
Temporary disk and packaging matter
Signing uses temporary disk and work folders while the app is being unpacked and rebuilt. For large apps, that alone adds real processing time.
3
Reuse helps
When the same app has already been signed with the same effective certificate and options, the system can reuse the existing signed build while it is still valid.