# 0.91s - CORE:match  if( $l_line =~ m/$REGEXP_READONLY/ ) {
    # 0.75s - CORE:match  if( $l_line =~ m/${\REGEXP_CONSTANT}/ ) {
    # 0.84s - CORE:match  if( $l_line =~ m/999986/ ) {
    # 0.75s - CORE:match  if( $l_line =~ m/$REGEXP_READONLY/o ) {   # /o
    # 0.78s - CORE:match  if( $l_line =~ $l_search_r ) {            # qr//
    # 0.76s - CORE:match  if( $l_line =~ m/$l_search/ ) {
    # 0.76s - CORE:match  if( $l_line =~ m/$l_search/o ) {          # /o