Upload Speeds in UEFN Session Launch Are Significantly Lower Than Available Bandwidth

SupremeUEFN
Thu, 16 Oct 2025 20:25:56 +0000
Issues and Bug Reporting

Summary

When launching a session and the uploading phase begins, the upload speed is much lower than expected. Despite having a 20 MB/s (200 Mb/s) connection, UEFN only utilizes around 5 MB/s or less during uploads.

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Other

Steps to Reproduce

1. Upload assets to your project.

2. Launch a session in UEFN.

3. Observe the upload window that shows how much data is being pushed and the current upload speed.

Expected Result

The upload process should utilize my available upload bandwidth (around 15–20 MB/s) for faster content upload.

Observed Result

The upload speed rarely exceeds 5 MB/s, often dropping even lower, despite having a 20 MB/s (200 Mbps) connection.

Platform(s)

PC

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Additional Notes

The upload process should make better use of available bandwidth to speed up project synchronization and session launch times. The current limited upload utilization significantly slows down testing and iteration.

14 posts - 6 participants