From: Francis Cianfrocca <garbagecat10@...>
Date: 2006-08-13T22:37:04+09:00
Subject: Re: Looking for a Fast Persistent Store

On 8/13/06, Bob Hutchison <hutch@recursive.ca> wrote:
 > I absolutely agree which is why I've implemented the filesystem route
> first. There is *no* performance problem with it.

The fastest thing I ever wrote was a transactional persistent store
for a guaranteed-devlivery messaging system. It used a decidedly
space-wasting design, and profiled approximately 100 times faster than
the filesystem on all supported platforms (Windows, Linux, Solaris) at
the time it was written (about eight years ago), assuming enough I/O
and memory bandwidth was available to make the comparison meaningful.
Most of the speed came by taking advantage of the tunings in the
kernel's VMM.

But I can't imagine writing such a thing in Java. What does Perst do
to be so fast?