Bug#470488: apt-file: Speed can be increased by using zgrep

[Stefan Fritsch]

Package: apt-file
Version: 2.0.8.2
Severity: wishlist
Tags: patch

In the case of non-regexp searches, apt-file's speed can be increased by a
factor of two by using zgrep. Patch is attached.

--- apt-file    2008-03-11 15:51:32.000000000 +0100
+++ /usr/bin/apt-file   2006-11-14 15:43:42.000000000 +0100
@@ -238,9 +238,6 @@
     my ($pack, $file);
     debug "regexp: $pattern";
     $|=1;
-    my $zcat = $Conf->{is_regexp}    ? "zcat" :
-              $Conf->{ignore_case}  ? "zfgrep -i $Conf->{pattern}" :
-              "zfgrep $Conf->{pattern}";
     my $regexp = eval { $Conf->{ignore_case} ? qr/$pattern/i : qr/$pattern/ };
     error($@) if $@;
     foreach(@$data) {
@@ -248,8 +245,8 @@
        next if (! -f $file);
        $file = quotemeta $file;
        debug "Search in $file";
-       open (ZCAT, "$zcat $file |") ||
-           warning "Can't $zcat $file";
+       open (ZCAT, "zcat $file |") ||
+           warning "Can't zcat $file";
        while(<ZCAT>) {
            next if ! (($pack, $file) = /$regexp/);
            debug_line ".";