[ZODB-Dev] ZODB open/close profilings

[Toby Dickenson]

On Tuesday 10 December 2002 7:17 pm, Jeremy Hylton wrote:

> I've never thought about the cost of _sane(), so this is a great
> clue.  I think part of the problem is that you don't use undo() enough
> <wink>.  The code scans the entire data.fs backwards, looking for a
> transaction marked with 'u' for undo.

I read it as scanning for a transaction *not* marked 'u'

'u' for non-transactional undo.... and noone(?) uses that any more.