The author profiled the Unreal Editor launch and discovered that SHA1—a slow, cryptographically secure hash—is being used during shader map compilation. Replacing it with a faster, non-cryptographic hash could meaningfully reduce editor startup times by skipping unnecessarily expensive hashing overhead.
Background
Shader compilation is one of the most time-consuming steps during Unreal Editor startup. The author is known for finding overlooked optimization opportunities in the editor's profiling data rather than focusing on already-optimized paths like shader compilation itself.
- Source
- Lobsters
- Published
- Oct 13, 2026 at 02:37 AM
- Score
- 6.0 / 10