Geoff Worboys wrote:

> Copying 220Mb of JPG photos to new files took me about 45
> seconds. Zipping the same 220Mb of files into a single zip
> took 60seconds. The resulting zip file was around 215 Mb.
>
> So approximately a 33% cost in time for a 1% gain in space.

There does seem to be a time penalty. If it was 220Mb of text, then I
get a 10Mb file in about 40seconds. Which does not take long to copy and
is a lot quicker to handle if not uncompressed at the server.

> This is of course way too fuzzy a measurement to be taken
> seriously. Lots of GUI stuff in the way of both tests along
> with caching issues and so on. OTOH there is obviously a
> cost involved. Real testing is required, with investigation
> of various options to avoid the pitfalls.

Hopefully we are throwing in enough evidence that it's not a simple
yes/no and we do need to be able to enable or disable in a number of
demonstrable situations.

--
Lester Caine
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L.S.Caine Electronic Services