Also, this test goes a bit faster with sync turned off, if mysql isn't
using sync that would be why it's so much faster.  Anyone know what the
default for mysql is?

For InnoDB I think it's like Postgres (only slower) ; for MyISAM it's no fsync, no transactions, no crash tolerance of any kind, and it's not a default value (in the sense that you could tweak it) it's just the way it's coded.

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