+ my $ifn = shift;
+ my $lfn = "$main::local_data/$ifn";
+ my $dfn = "$main::data/$ifn";
+
+ if (-e "$main::local_data") {
+ if ((-e $dfn) && (-e $lfn)) {
+ $lfn = $dfn if -M $dfn < -M $lfn;
+ } else {
+ $lfn = $dfn if -e $dfn;
+ }
+ } else {
+ $lfn = $dfn;
+ }
+
+ return $lfn;
+}
+
+# move a file or a directory from data -> local_data if isn't there already
+sub localdata_mv
+{
+ my $ifn = shift;
+ if (-e "$main::data/$ifn" ) {
+ unless (-e "$main::local_data/$ifn") {
+ move("$main::data/$ifn", "$main::local_data/$ifn") or die "localdata_mv: cannot move $ifn from '$main::data' -> '$main::local_data' $!\n";
+ }
+ }
+}
+
+# measure the time taken for something to happen; use Time::HiRes qw(gettimeofday tv_interval);
+sub _diffms
+{
+ my $ta = shift;
+ my $tb = shift || [gettimeofday];
+ my $a = int($ta->[0] * 1000) + int($ta->[1] / 1000);
+ my $b = int($tb->[0] * 1000) + int($tb->[1] / 1000);
+ return $b - $a;
+}
+
+# and in microseconds
+sub _diffus
+{
+ my $ta = shift;
+ my $tb = shift || [gettimeofday];
+ my $a = int($ta->[0] * 1000000) + int($ta->[1]);
+ my $b = int($tb->[0] * 1000000) + int($tb->[1]);
+ return $b - $a;
+}
+
+sub diffms
+{
+ my $call = shift;
+ my $line = shift;
+ my $ta = shift;
+ my $no = shift;
+ my $tb = shift;
+ my $msecs = _diffms($ta, $tb);
+
+ $line =~ s|\s+$||;
+ my $s = "subprocess stats cmd: '$line' $call ${msecs}mS";
+ $s .= " $no lines" if $no;
+ DXDebug::dbg($s);
+}
+
+# expects either an array reference or two times (in the correct order [start, end])
+sub difft
+{
+ my $b = shift;
+ my $adds = shift;