- work on test suite.
- localize the depth to guard against non-local exits.
Current overhead (with PERLDBf_NONAME) wrt non-debugging run (estimates):
8% extra call frame on DB::sub
7% output of subroutine data
70% output of timing data (on OS/2, 35% with custom dprof_times())
(Additional 17% are spent to write the output, but they are counted
and subtracted.)
With compensation for DProf overhead all but some odd 12% are subtracted ?!
- Calculate overhead/count for XS calls and Perl calls separately.
- goto &XSUB in pp_ctl.c;
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