document failed experiment

diff --git a/usr.sbin/pkg_add/OpenBSD/PackageRepository/Cache.pm b/usr.sbin/pkg_add/OpenBSD/PackageRepository/Cache.pm
index fe851f7..9746710 100644 (file)
--- a/usr.sbin/pkg_add/OpenBSD/PackageRepository/Cache.pm
+++ b/usr.sbin/pkg_add/OpenBSD/PackageRepository/Cache.pm
@@ -1,5 +1,5 @@
 # ex:ts=8 sw=4:
-# $OpenBSD: Cache.pm,v 1.8 2022/05/12 04:41:43 espie Exp $
+# $OpenBSD: Cache.pm,v 1.9 2022/05/16 15:54:04 espie Exp $
 #
 # Copyright (c) 2022 Marc Espie <espie@openbsd.org>
 #
@@ -84,6 +84,10 @@ sub prime_update_info_cache
                $total));
        my $done = 0;
        my $oldname = ""; 
+       # This can't go much faster, I've tried splitting the params
+       # and running several locate(1) in //, but this yields negligible
+       # gains for a lot of added complexity (reduced from 18 to 14 seconds
+       # on my usual package install).
        open my $fh, "-|", $self->pipe_locate(map { "$_-[0-9]*"} @list) 
            or $state->fatal("Can't run locate: #1", $!);
        while (<$fh>) {