Thanks to Jayant, I had to clean coffee off my screen, but keyboard is a bit more tricky. This is Postgres advocacy at its best:

The base timings are almost 5 times more in mysql as compared to pgsql.

Then in comments, Harrison points out:

From the numbers, it is hard to believe that PostgreSQL is really fsync’ing properly there. I doubt a laptop HDD can do 1000 writes per second. Even assuming we have perfect group commit going on, with two threads it is still 500 per second for the first test. InnoDB’s numbers are about right on for writes per second for a cheap commodity hdd.

Jayant’s answer is:

You may be right. But postgres is a more advanced and reliable database as compared to mysql.