mirror of
https://github.com/Jermolene/TiddlyWiki5
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37 lines
1.6 KiB
Plaintext
37 lines
1.6 KiB
Plaintext
created: 20190316163428191
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modified: 20190510133455372
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tags: Features
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title: Performance Instrumentation
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type: text/vnd.tiddlywiki
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The core has built-in performance instrumentation for the refresh cycle. See “Performance Instrumentation” on the “Settings” tab of control panel. The wiki will need to be reloaded before it takes effect.
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With performance instrumentation switched on, there is additional timing information displayed the browser developer console each time a refresh cycle is triggered. For example:
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```
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performance: mainRender: 327.83ms
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performance: styleRefresh: 9.14ms
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performance: mainRefresh: 68.10ms
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```
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The information above should be interpreted as follows:
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* mainRender is the time taken for the initial display of the page template
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* styleRefresh is the time taken to refresh the page stylesheet
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* mainRefresh is the time taken to refresh the main page template
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As an example, try switching between the sidebar tabs to compare how long they take to render.
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More detailed information on filter execution timings is also available. With performance instrumentation enabled, type the following JavaScript command in the browser developer console:
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```
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$tw.perf.log()
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```
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A table is displayed with the following information:
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* ''name'' - the string "Filter: " plus the text of the filter
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* ''invocations'' - the number of invocations of the filter since startup
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* ''totalTime'' - the total time in milliseconds spent evaluating this filter since startup
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* ''percentTime'' - the percentage of the execution time of this filter against the total execution time of all filters
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