NOTE: 1.90. PROF/PERF up! you don't need need new client on PERF/PROF server !
there is branch on steam you may use, but beware that sometimes data on my dropbox're newer due to manual build e.g. on weekend:
Servers (down, up only if needed):
PERF = STABLE branch compatible, no debug layer, no #captureFrame nor diag_captureFrame
PROF = STABLE branch compatible, with debug layer, with #captureFrame / diag_captureFrame
possible server fps increases and clients may experience higher fps too