Add forking IPC profiling script

profiling/ok_test2_ipc_fork.t

@@ -0,0 +1,28 @@
+use strict;
+use warnings;
+use Test2::IPC;
+use Test2::Tools::Tiny;
+
+my $count = $ENV{OK_COUNT} || 100000;
+plan($count);
+
+my $procs = $ENV{PROC_COUNT} || 4;
+
+$count /= $procs;
+
+my @PIDS;
+
+for (1 .. $procs) {
+    my $pid = fork();
+    if ($pid) { # parent;
+        push @PIDS => $pid;
+    }
+    else { # child
+        ok(1, "an ok $$") for 1 .. $count;
+        exit 0;
+    }
+}
+
+waitpid($_, 0) for @PIDS;
+
+1;