+SKIP: {
+ my $nproc = $ENV{TEST_STRESS_NPROC};
+ skip 'TEST_STRESS_NPROC= not set', 1 unless $nproc;
+ my $nr = $ENV{TEST_STRESS_NR} // 10000;
+ diag "TEST_STRESS_NPROC=$nproc TEST_STRESS_NR=$nr";
+ require POSIX;
+ for my $n (1..$nproc) {
+ defined(my $pid = fork) or BAIL_OUT "fork: $!";
+ if ($pid == 0) {
+ my $url = "imap://example.com/INBOX.$$";
+ my $uidval = time;
+ eval {
+ my $itrk = PublicInbox::IMAPTracker->new($url);
+ for my $uid (1..$nr) {
+ $itrk->update_last($uidval, $uid);
+ my ($uv, $u) = $itrk->get_last;
+ }
+ };
+ warn "E: $n $$ - $@\n" if $@;
+ POSIX::_exit($@ ? 1 : 0);
+ }
+ }
+ while (1) {
+ my $pid = waitpid(-1, 0);
+ last if $pid < 0;
+ is($?, 0, "$pid exited");
+ }
+}