From 155ee9cdaffd6232ef3c774d1a9f61d708fc8d6e Mon Sep 17 00:00:00 2001
From: Eric Wong <e@80x24.org>
Date: Mon, 30 Jan 2023 04:30:58 +0000
Subject: tests: make slow tests easier-to-find

t/run.perl now prints slowest 10 tests at startup, and I've
added ./devel/longest-tests to print all tests sorted by
elapsed time.

This should allow us to notice outliers more quickly in the
future.
---
 MANIFEST            | 1 +
 devel/longest-tests | 7 +++++++
 t/run.perl          | 4 ++++
 3 files changed, 12 insertions(+)
 create mode 100755 devel/longest-tests

diff --git a/MANIFEST b/MANIFEST
index f22f60aa..aba32762 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -121,6 +121,7 @@ contrib/css/README
 contrib/selinux/el7/publicinbox.fc
 contrib/selinux/el7/publicinbox.te
 devel/README
+devel/longest-tests
 devel/syscall-list
 examples/README
 examples/README.unsubscribe
diff --git a/devel/longest-tests b/devel/longest-tests
new file mode 100755
index 00000000..bf46e166
--- /dev/null
+++ b/devel/longest-tests
@@ -0,0 +1,7 @@
+eval 'exec perl -wS $0 ${1+"$@"}' # this script is too short to copyright
+if 0; # running under some shell
+use v5.12; use autodie; use YAML::XS qw(Load);
+open(my $fh, '<', shift // '.prove');
+my $t = Load(do { local $/; <$fh> })->{tests};
+my @t = sort { $t->{$b}->{elapsed} <=> $t->{$a}->{elapsed} } keys %$t;
+printf "%0.6f %s\n", $t->{$_}->{elapsed}, $_ for @t;
diff --git a/t/run.perl b/t/run.perl
index b90715a6..f68dab60 100755
--- a/t/run.perl
+++ b/t/run.perl
@@ -85,6 +85,10 @@ if ($shuffle) {
 	@tests = sort {
 		($t->{$b}->{elapsed} // 0) <=> ($t->{$a}->{elapsed} // 0)
 	} @tests;
+	say "# top 10 longest tests (`make check' regenerates)";
+	for (@tests[0..9]) {
+		printf "# %0.6f %s\n", $t->{$_}->{elapsed}, $_;
+	}
 }
 
 our $tb = Test::More->builder;
-- 
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