Added utility [#METR-2944].

utils/postprocess-traces/postprocess-traces.pl

@@ -0,0 +1,49 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+use Data::Dumper;
+
+my @current_stack = ();
+my $grouped_stacks = {};
+
+while (my $line = <>)
+{
+    chomp $line;
+
+    if ($line =~ '^#')
+    {
+        $line =~ s/^#\d+\s+//;
+        $line =~ s/ \([^\)]+=[^\)]+\) / /g;
+        push @current_stack, $line;
+    }
+
+    if ($line eq '')
+    {
+        my $group = \$grouped_stacks;
+        for my $frame (reverse @current_stack)
+        {
+            $$group->{count} ||= 0;
+            ++$$group->{count};
+            $group = \$$group->{children}{$frame};
+        }
+
+        @current_stack = ();
+    }
+}
+
+sub print_group
+{
+    my $group = shift;
+    my $level = shift || 0;
+
+    for my $key (sort { $group->{children}{$b}{count} <=> $group->{children}{$a}{count} } keys %{$group->{children}})
+    {
+        my $count = $group->{count};
+        print(('| ' x $level) . $count . (' ' x (5 - (length $count))) . $key . "\n");
+        print_group($group->{children}{$key}, $level + 1);
+    }
+}
+
+print_group($grouped_stacks);