Comment 126 for bug 1502556

(In reply to Rex Dieter from comment #111)
> That test case is not reproducible for me, clock widget with seconds
> displayed... plasmashell hasn't grown any over the course of the past few
> minutes at least.

Few minutes is very short time for test with clock.

Faster test:
 - download plasmoid thermal monitor and set:
     - refresh speed - 0.1s
     - create 5 fields for temperature monitoring (physical id and 4 cores)
 - in this test is leak speed is 12MB / minute

Is any chance for use memory leak profiler please? For example compile plasma-workspace with library jemalloc and use jeprof.
Valgrind is too slow and not monitor during run. But jemalloc is ideal library for memory monitoring.