Anyone know why a legacy FSFD would be significantly slower on Windows 7
than on, say, Vista or XP?
On 3/16/2010 1:23 PM, Neil Weicher wrote:
Anyone know why a legacy FSFD would be significantly slower on Windows 7
than on, say, Vista or XP?
There have been some side comments at previous plugfests about how code
paths within FM are optimized and if they need to call out to legacy
filters, it complicates things and thus impacts performance.
What level of degradation are you seeing? For which type of
functionality in the filter?
Thanks,
Pete
–
Kernel Drivers
Windows File System and Device Driver Consulting
www.KernelDrivers.com
866.263.9295
The slowdown for writing to an encrypted file was about 40-50% slower.
“Peter Scott” wrote in message
news:xxxxx@ntfsd…
> On 3/16/2010 1:23 PM, Neil Weicher wrote:
>> Anyone know why a legacy FSFD would be significantly slower on Windows 7
>> than on, say, Vista or XP?
>>
>
> There have been some side comments at previous plugfests about how code
> paths within FM are optimized and if they need to call out to legacy
> filters, it complicates things and thus impacts performance.
>
> What level of degradation are you seeing? For which type of functionality
> in the filter?
>
> Thanks,
>
> Pete
>
> –
> Kernel Drivers
> Windows File System and Device Driver Consulting
> www.KernelDrivers.com
> 866.263.9295
>
On 3/17/2010 2:04 PM, Neil Weicher wrote:
The slowdown for writing to an encrypted file was about 40-50% slower.
Is this comparing the write time of a file on Vista vs. Win 7? Have you
made the same comparison without your filter? This way you can normalize
the result and actually get an idea of the difference on Win 7.
Maybe they are optimizing the non-legacy pathways and the addition of a
legacy filter would create more overhead. It would be great if a MSFT
dev could chime in here …
Pete
“Peter Scott” wrote in message
> news:xxxxx@ntfsd…
>> On 3/16/2010 1:23 PM, Neil Weicher wrote:
>>> Anyone know why a legacy FSFD would be significantly slower on Windows 7
>>> than on, say, Vista or XP?
>>>
>>
>> There have been some side comments at previous plugfests about how code
>> paths within FM are optimized and if they need to call out to legacy
>> filters, it complicates things and thus impacts performance.
>>
>> What level of degradation are you seeing? For which type of functionality
>> in the filter?
>>
>> Thanks,
>>
>> Pete
>>
>> –
>> Kernel Drivers
>> Windows File System and Device Driver Consulting
>> www.KernelDrivers.com
>> 866.263.9295
>>
>
>
>
>
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–
Kernel Drivers
Windows File System and Device Driver Consulting
www.KernelDrivers.com
866.263.9295