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62 lines
3 KiB
Text
62 lines
3 KiB
Text
COMMENT(!MOD!
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A module allowing profiling for shell functions.
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!MOD!)
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cindex(functions, profiling)
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When loaded, the tt(zprof) module makes shell functions be
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profiled. The profiling results can be obtained with the tt(zprof)
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builtin command made available by this module. There is no way to turn
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profiling off other than unloading this module.
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startitem()
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findex(zprof)
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item(tt(zprof) [ tt(-c) ])(
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Without the tt(-c) option, tt(zprof) lists profiling results to
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standard output. The format is comparable to that of commands like
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tt(gprof).
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At the top there is a summary listing all functions that were called
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at least once. This summary is sorted in decreasing order by the
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amount of time spent in the functions themselves. Each line is
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preceded by the number of the function in this order (which is used in
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other parts of the list in suffixes of the form
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`tt([)var(num)tt(])'). The second column gives the number of calls
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made to this function. The next three columns list the time in
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milliseconds spent in the function and its descendents, the average
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time in milliseconds spent in the function and its descendents per
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call and the percentage of time spent in all shell functions used in
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this function and its descendents. The following three columns give
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the same information, but counting only the time spent in the function
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itself. The last column finally shows the name of the function.
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After the summary, detailed information about every function that was
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invoked is listed, sorted in decreasing order by the amount of time
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spent in the functions and their descendents. Each of these entries
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consists of descriptions for the functions that called the function
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described, the function itself, and the functions that were called
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from it. The description for the function itself has the same format
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as in the summary (and shows the same information). The other lines
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don't show the number of the function at the beginning and have their
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function named indented to make it easier to visually distinguish the
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line showing the function described in the section from the
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surrounding lines.
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The information shown for the calling and the called functions is
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almost the same as in the summary, but is always only for the call arc
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described. For example, for a calling function the column showing the
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total running time lists the time spent in the described function and
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its descendents when it was called from the calling
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function. Likewise, for a called function, this columns lists the
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total time spent in the called function and its descendents when it
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was called from the function described.
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For the calling and the called functions, the column showing the
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number of calls to a function also show the total number of
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invocations made to the called function after a slash.
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As long as the tt(zprof) module is loaded, profiling will be done and
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multiple invocations of the tt(zprof) builtin command will show the
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times and numbers of calls since the module was loaded. With the
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tt(-c) option, the tt(zprof) builtin command will reset its internal
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counters and will not show the listing.
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)
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enditem()
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