tree c721ed789bf3e22287626d72c457656e73f73cea
parent 3b78f2aa5ded32126fe20093d63d37d39d468e1a
author Willy Tarreau <w@1wt.eu> 1631109066 +0200
committer Willy Tarreau <w@1wt.eu> 1631109187 +0200
encoding latin1

OPTIM: vars: do not keep variables usage stats if no limit is set

The sole purpose of the variable's usage accounting is to enforce
limits at the session or process level, but very commonly these are not
set, yet the bookkeeping (especially at the process level) is extremely
expensive.

Let's simply disable it when the limits are not set. This further
increases the performance of 12 variables on 16-thread from 1.06M
to 1.24M req/s.