Time spent in method

kent37 · Post by **kent37** » Thu Sep 09, 2004 6:36 pm

Is there a way to show the time spent in a method not counting the time in called methods? For example the Invocation Tree might show
com.skillsoft.cb.importer.ExcelImporter.importXls(String) 13,029
com.skillsoft.cb.importer.ExcelImporter.importCourses() 8,260
com.skillsoft.cb.hibernate.HibernateCbDao.clearDatabase() 2,411
com.skillsoft.rattler.data...<init>(File) 1,894
com.skillsoft.cb.importer.ExcelImporter.importCategories6() 348

The called methods only add up to 12913 meaning 116 was spent in importXls. This is not the best example; sometimes the difference is greater.

Thanks!
Kent

Post by **Anton Katilin** » Fri Sep 10, 2004 10:48 am

There will be no "own" time in the version 3.0 which will be released very soon. We'll re-consider this issue preparing feature list for the version next to 3.0.

By the way, how can this be used? If method a() itself takes 1 second and calls b() which takes 10 seconds, then overall time of a() is 11 seconds and isn't it better to optimize b() (or call chipper variant of b()) rather than own code of a()? I suppose that "own" times of methods in entire program will be in common case relatively uniformely distributed.

kent37 · Post by **kent37** » Fri Sep 10, 2004 1:12 pm

Sometimes the "own" time is dominant. For example if a() takes 10 seconds and also calls b(), c() and d() each of which are 1 second, the total time is 13 seconds which is dominated by the time in a().

jcompagner · Post by **jcompagner** » Sat Sep 11, 2004 9:22 am

i already requested this feature by mail. It would be very nice to see this because now you really can't see where the real holdup is.

what would be nice:

com.skillsoft.cb.importer.ExcelImporter.importXls(String) 13,029 (116)
com.skillsoft.cb.importer.ExcelImporter.importCourses() 8,260
com.skillsoft.cb.hibernate.HibernateCbDao.clearDatabase() 2,411
com.skillsoft.rattler.data...<init>(File) 1,894
com.skillsoft.cb.importer.ExcelImporter.importCategories6() 348

so: total time (in method time)

i have the same thing with object creations/what a method cost in memory. Also there i would like to see how many new Object() the method itself did and how much memory those things cost..

falk · Post by **falk** » Fri Oct 08, 2004 10:04 pm

Hi there.

I have registered and tried version 3.1 beta just and ONLY to check out this missing feature. I tried v2.5 and saw this feature is missing. Therefore, I throw it away. Now I got the invitation to check out 3.1 and get one free license

What shall I say?

Without the feature to compute a methods internally consumed time (w/o counting callees times which are listed anyway) and the feature to SORT by this time, a debugger is useless. Really! Just believe me. You as a profiler maker must be sort of crazy not to have started right there... Some commercial vendors are even able to list and sort by time spent by source LINE. This feature was named 'own time' in this discussion thread.

To be precise: The own time of a method would be the total time summed over all invocations spent in this method which was not spent in another method.

So please, sit down, make homework and come back to me then.

Somebody asked why this feature would be useful?

Maybe some theory may help to understand this. After all, programs are algorithms which perform work. In order to optimize, it is important to see which part of an algorithm consumes time, not how and why this part gets called.

For instance, in an XML parser, I need to see that java.lang.String.<init> () is the hot spot in order to understand that I can win be replacing it by java.lang.String.substring(). That this may happen in a SAX-event callback is completely irrelevant. So, please... Build a profiler, not a toy.