LP:1008334 - Benchmark Query 4x Faster on MySQL 5.5

Running this query is almost four times faster on MySQL than the same version of MariaDB.

SELECT BENCHMARK(10000000,DATE_SUB(FROM_UNIXTIME(RAND() * 2147483648), INTERVAL (FLOOR(1 + RAND() * 365)) DAY));

Results on Workstation Win7 x64 16gb i7 3ghz

• MariaDB 5.3.3 - 17.05 secs
• MySQL 5.5.17 - 4.09 secs

Results on Server Win2k8 R2 x64 8gb Xeon 1270 3.4ghz

• MariaDB 5.5.24 - 22.09 secs
• MySQL 5.5.24 - 5.90 secs

Results on older server running Win2k3 x32 4gb Xeon 5050 3ghz

• MySQL 5.0.27 - 22.00 secs

Is there any reason this query would be running so much slower on MariaDB vs MySQL?