[OpenLayers-Users] Firefox memory usage

[Jon Britton]

Thanks for the info.
Firebug does seem to make a big difference. Without it on Firefox uses much
less memory, but still much more than IE6. What you say about decompressed
images would explain this part of the problem. I guess it's just something I
have to deal with!

Thanks,
Jon



Paul Spencer-5 wrote:
> 
> Opps, that's not 260 MB ... only about 26.
> 
> Cheers,
> 
> Paul
> 
> On 29-Jan-08, at 8:03 PM, Paul Spencer wrote:
> 
>> The other issue for firefox 2 is that it decompresses all the tiles  
>> and stores them as decompressed RGBA images in memory.  For a  
>> 256x256 pixel tile at 4 bytes per pixel, this works out to 260k per  
>> tile - regardless of the original format.  Depending on the size of  
>> your viewport and taking into consideration the buffer of tiles that  
>> OL keeps outside the viewport, it is easy to have more than 100  
>> tiles in three layers, that's 260 MB of memory, just in tiles.  This  
>> is one of the big issues fixed in firefox 3.  The same OL app  
>> running in firefox 3 only uses about 70-80 MB.
>>
>> Cheers
>>
>> Paul
>>
>> On 29-Jan-08, at 2:32 PM, cmose wrote:
>>
>>>
>>> I believe part of it is firebugs network monitoring feature. In my  
>>> specific
>>> case I have multiple dns entries for my tilecache server so the  
>>> browser is
>>> firing off a significant number of requests. Having firebug monitor  
>>> these
>>> requests was consuming a bunch of memory and slowing things down a  
>>> good
>>> deal.
>>>
>>>
>>> Jon Britton wrote:
>>>>
>>>>
>>>> Ah.. yes I do. I'll turn it off tomorrow when I get a chance and  
>>>> see if it
>>>> makes a difference. I wonder why that would do it... there must be  
>>>> a bug
>>>> somewhere with it.
>>>> Thanks,
>>>> jon
>>>>
>>>>
>>>> cmose wrote:
>>>>>
>>>>> Do you have firebug enabled? Firefox consumes massive amounts of  
>>>>> memory
>>>>> when I'm running my client with firebug enabled...
>>>>>
>>>>>
>>>>> Jon Britton wrote:
>>>>>>
>>>>>> Hi,
>>>>>> I'm using Firefox to display a map serverd by GeoServer with  
>>>>>> only three
>>>>>> layers being displayed (Google, roads, points). In Internet  
>>>>>> Explorer 6
>>>>>> the memory usage sticks to around 60MB, however Firefox just keeps
>>>>>> eating up memory and lags my machine! At the moment I'm running  
>>>>>> it and
>>>>>> it's hit 350MB memory usage. It's as if it's cachine the images  
>>>>>> itself
>>>>>> or something.
>>>>>>
>>>>>> Has anybody else had a problem with this?
>>>>>>
>>>>>> Thanks,
>>>>>> Jon
>>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>
>>> -- 
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>>> Sent from the OpenLayers Users mailing list archive at Nabble.com.
>>>
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