## mark a section (Learn more)

php > $blah="blah"; $s=microtime(true); for($i=0;$i<100000;$i++) "omgwtf$blah\n"; echo microtime(true)-$s; 0.044615983963013 php > $blah="blah"; $s=microtime(true); for($i=0;$i<100000;$i++) 'omgwtf'.$blah."\n"; echo microtime(true)-$s; 0.042807102203369

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