Since you're searching for a constant string, index is faster than a regexp:
foreach my $elem (@repos) {
my $repo_name = $elem;
my $pos = index(lc($repo_name), lc($svnroot));
if ($pos >= 0) {
substr($repo_name, $pos, length($svnroot), '');
}
print("$repo_name\n");
}
Or since you probably meant to search for /^\Q$svnroot\E/ (i.e. search for $svnroot at the beginning of the string), this is more precise and even faster:
foreach my $elem (@repos) {
if (lc($svnroot) eq substr(lc($elem), 0, length($svnroot))) {
print(substr($elem, length($svnroot)), "\n");
} else {
print("$elem\n");
}
}
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