Manual:$wgProfileOnly

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This feature was removed from MediaWiki core in version 1.35.0. Please see $wgProfiler['output'] for an alternative way to use this feature.

Profiling: $wgProfileOnly
Don't put non-profiling info into log file
Introduced in version:	pre 1.1.0
Deprecated in version:	1.23.0 (Gerrit change 121336; git #d966a526)
Removed in version:	1.35.0 (Gerrit change 560355; git #049dd15d)
Allowed values:	(boolean)
Default value:	`false`
Other settings: Alphabetical \| By function

Details[edit]

Don't put non-profiling info into log file

Since MediaWiki 1.23, you can set the log file in $wgDebugLogGroups ['profileoutput'] to achieve the same functionality.