StaticPropLighting in VRAD has become extremely slow

[halfpeeps]

Details

Seemingly after an Update on December 2nd to the 64bit branch, VRAD (bin/win64) has become incredibly slow and unstable, specifically for ComputeStaticLighting, with it taking considerably longer than it used to (30 seconds has become 6 minutes), and sometimes crashing altogether (possibly unrelated). We have tested on multiple systems and with multiple map files, including ones that compiled fine before December 2nd.

Our vrad parameters are:
-hdr -final -StaticPropLighting -StaticPropPolys -TextureShadows -ambientocclusion -LargeDispSampleRadius -noskyboxrecurse -game $gamedir $path\$file

Steps to reproduce

1. Load a map with a moderate/regular amount of props
2. Enable StaticPropLighting in light_exe parameters
3. Compile

[robotboy655]

This slowdown is due to the fact that static prop lighting was always working in "fast" mode, as if -fast parameter was present. This was fixed in CS:GO, and now in GMod to correctly do a fast pass only when -fast option is enabled.

If you are experiencing crashes, please report them properly, by providing steps to reproduce, or at the very least the crash dumps.

[Unusuario2]

this issue maybe is related to #6121

[halfpeeps]

This slowdown is due to the fact that static prop lighting was always working in "fast" mode, as if -fast parameter was present. This was fixed in CS:GO, and now in GMod to correctly do a fast pass only when -fast option is enabled.

If you are experiencing crashes, please report them properly, by providing steps to reproduce, or at the very least the crash dumps.

To anyone who comes accross this, this was the answer, the slow speed is intended behaviour. (The crasing was unrelated and is now fixed)