[OpenLayers-Dev] Caching layerimages by browsers

Tim Schaub tschaub at opengeo.org
Tue Mar 9 14:36:24 EST 2010

Tim Schaub wrote:
> Claude Philipona wrote:

... snip ...

> At some point, I imagine this Firefox limitation will be gone.  Properly 
> using cache related headers will always be good advice.


Though it has been open for 5 years, there's always hope :)


> Tim
>>    The Firefox disk cache hash functions can generate collisions for
>> URLs that differ only slightly, namely only on 8-character boundaries.
>> When resources hash to the same key, only one of the resources is
>> persisted to disk cache; the remaining resources with the same key have
>> to be re-fetched across browser restarts. Thus, if you are using
>> fingerprinting or are otherwise programmatically generating file URLs,
>> to maximize cache hit rate, avoid the Firefox hash collision issue by
>> ensuring that your application generates URLs that differ on more than
>> 8-character boundaries.
>> Claude
>> _______________________________________________
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>> http://openlayers.org/mailman/listinfo/dev

Tim Schaub
OpenGeo - http://opengeo.org
Expert service straight from the developers.

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