I've just run ZopeProfiler few times to check which functions are
slowest in my site and during analysis of the results I've found
something that confuses me a bit.
When I'm showing results using "print_stats" and ordered by "time"
I get times:
calls tottime percall cumtime percall function
... total_x ... cumulative_x ... X:1026(__call__)
for function X.
This seemed good till I've used "print_callees" format which
showed me that function X is calling function Y and Z and
their execution times are:
functions_time = Y_call_time + Z_call_time.
As far as I understand it "tottime" is the time without
subfunctions' call times and "cumtime" is with subfunctions'
call times, so I supposed that:
cumulative_x - functions_time = total_x
but this is not true... in almost every case I've checked it is
total_x + functions_time > cumulative_x
Why? I don't think these are concurrent threads...
but what makes this difference? It's possibly
something trivial but... ;)
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