Don't PreJIT in editor, it adds a couple of seconds to startup time Unused IAssetSystem::OverrideAssetsWithVPK Stick a cache on FixupSearchPathName as it's a hot path whilst compiling due to CResourceCompilerPathScope https://files.facepunch.com/matt/1b2011b1/Profiler_WExqSdLF2F.png Let's try all "CONTENT" paths as "GAME" paths and remove "CONTENT" search paths, maybe everything will still work And then we can remove this extra PathScope for "CONTENT"