Re: [Valgrind-users] DHAT speed

[John R. <jr...@bi...>]

>  > So (4 * 5 * 10 * 3) is a slowdown of 600X, which turns 10 minutes into 100 hours.
> 
> What I'm seeing is a DHAT-only slowdown that is much more than that.

Running 'perf' is likely to give data and strong hints about what is going on.
The overhead of 'perf' is only a few percent.

     perf record valgrind --tool=DHAT <<valgrind_args>> ./my_app <<my_app_args>>
     perf report  > perf_output.txt

The "perf record ..." will stop shortly after the valgrind sub-process terminates.
You don't have to wait for DHAT to finish; just 'kill' it after a while.