perl: added benchmark script for deserialization

perl/benchmark/deserialize.pl

@@ -0,0 +1,20 @@
+use strict;
+use warnings;
+use Data::MessagePack;
+use JSON::XS;
+use Benchmark ':all';
+
+my $a = [0..2**24];
+my $j = JSON::XS::encode_json($a);
+my $m = Data::MessagePack->pack($a);
+
+print "-- deserialize\n";
+print "JSON::XS: $JSON::XS::VERSION\n";
+print "Data::MessagePack: $Data::MessagePack::VERSION\n";
+cmpthese(
+    -1 => {
+        json => sub { JSON::XS::decode_json($j)     },
+        mp   => sub { Data::MessagePack->unpack($m) },
+    }
+);
+