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61 lines
3 KiB
Text
61 lines
3 KiB
Text
COMMENT(!MOD!zsh/zprof
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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(zsh/zprof) causes shell functions to be profiled.
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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 the 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 of the
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amount of time spent in each. The lines contain
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the number of the function in 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(])'), then the number of calls made to the function.
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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 final column 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 of the amount of time spent
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in each function and its descendents. Each of these entries consists of
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descriptions for the functions that called the function described, the
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function itself, and the functions that were called from it. The
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description for the function itself has the same format as in the summary
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(and shows the same information). The other lines don't show the number of
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the function at the beginning and have their function named indented to
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make it easier to distinguish the line showing the function described in
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the section from the surrounding lines.
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The information shown in this case is almost the same as in the summary,
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but only refers to the call hierarchy being displayed. For example, for a
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calling function the column showing the total running time lists the time
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spent in the described function and its descendents only for the times when
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it was called from that particular calling function. Likewise, for a
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called function, this columns lists the total time spent in the called
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function and its descendents only for the times when it was called from the
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function described.
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Also in this case, the column showing the number of calls to a function
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also shows a slash and then the total number of invocations made to the
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called function.
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As long as the tt(zsh/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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