Luminous Landscape Forum
Raw & Post Processing, Printing => Adobe Lightroom Q&A => Topic started by: Per Zangenberg on April 23, 2010, 04:56:18 am
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I am thinking about swapping my Core 2 Duo e8400 (@3.7GHz) for a Quad core 9550/9650 and am wondering if LR3 will be faster in editing operations or only when exporting?
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Hi,
My impression is that there are some gains in generating previews but probably not in editing.
What should be faster in editing? The answer may depend on the question...
Best regards
Erik
I am thinking about swapping my Core 2 Duo e8400 (@3.7GHz) for a Quad core 9550/9650 and am wondering if LR3 will be faster in editing operations or only when exporting?
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Hi,
My impression is that there are some gains in generating previews but probably not in editing.
What should be faster in editing? The answer may depend on the question...
Best regards
Erik
If am thinking about when you open a new image in edit mode, it takes a certain time to open/render the preview before you can start editing.
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I think I read somewhere that LR can only use two cores, but I forget where now.
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I think I read somewhere that LR can only use two cores, but I forget where now.
Well that is not true, because you can certainly use more by running more than one output thread for example.
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Well that is not true, because you can certainly use more by running more than one output thread for example.
You can, but you can do that with a single-core system as well. Just because it runs multiple threads doesn't mean the OS and LR can fully utilize multiple threads.
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LR 1, 2, and 3 all offer increased speed during editing (e.g., Develop) when using more cores (up to 8, at present).
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Hi,
That is generating previews. My impression is that it's not faster on quadcore than on duocore, but it seems that it can generate four previews simultaneously on quad core. The effect is that the first image takes some time to load but the next ones are much faster (semi instantaneous). I don't think that LR is very good at utilizing hyperthreading. Also I'd suggest that having enough memory is most important. You also need a 64 bit operating system.
Best regards
Erik
If am thinking about when you open a new image in edit mode, it takes a certain time to open/render the preview before you can start editing.
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Hi,
That is generating previews. My impression is that it's not faster on quadcore than on duocore, but it seems that it can generate four previews simultaneously on quad core. The effect is that the first image takes some time to load but the next ones are much faster (semi instantaneous). I don't think that LR is very good at utilizing hyperthreading. Also I'd suggest that having enough memory is most important. You also need a 64 bit operating system.
Best regards
Erik
Thank you. I have 8GB RAM and am running Windows 7 64-bit.
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Perhaps some of the bottleneck isn't due to the lack of hyperthreading and use of multiple cores - I can't think of a better expert on this than Eric since he is involved in writing some of the code so I think he's answered the question.
I think drive access is signifiant. To maximize performance a multiple drive raid o system, maybe even SAS 15k rpm drives with lots of ram would valuable. Then you may actually be able to get enough data off of the drive to supply those cores.
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Perhaps some of the bottleneck isn't due to the lack of hyperthreading and use of multiple cores - I can't think of a better expert on this than Eric since he is involved in writing some of the code so I think he's answered the question.
I think drive access is signifiant. To maximize performance a multiple drive raid o system, maybe even SAS 15k rpm drives with lots of ram would valuable. Then you may actually be able to get enough data off of the drive to supply those cores.
Ok, I already use 2x RAID0 drives (4 drives).
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LR 1, 2, and 3 all offer increased speed during editing (e.g., Develop) when using more cores (up to 8, at present).
Just to be PERFECTLY clear, you really, honestly _DO_ want to pay attention to what 'madmanchan' is saying, ok? I mean it's one thing to listen to the typical internet pun-dents, but it's another thing to listen to the guys that write the friggin' code, ok?
If Eric is saying multi cores help develop and processing then it does, ya know?
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Just to be PERFECTLY clear, you really, honestly _DO_ want to pay attention to what 'madmanchan' is saying, ok? I mean it's one thing to listen to the typical internet pun-dents, but it's another thing to listen to the guys that write the friggin' code, ok?
If Eric is saying multi cores help develop and processing then it does, ya know?
Jeff, I'm wondering if I'm the first to point out the huge difference between how your commentary comes across in person/videos versus in written word?
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Jeff, I'm wondering if I'm the first to point out the huge difference between how your commentary comes across in person/videos versus in written word?
No...what's your point?
Again, let me be even more clear, you are a friggin' idiot if you don't pay attention to every single word Eric may have to say...
Is that more clear?
(oh, is that not what you meant?)
:~)
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Hi,
I have no doubt regarding Eric's comment.
With regard to bottlenecks, I don't really see disk access as the main problem. I simply observed CPU and disk activity in the Activity Monitor, it seems to be quite low.
Different tools may work in different ways. I just tried to use a large adjustment brush on my quad core and it causes about 350% load on CPU, so it utilizes four cores pretty well. Just doing sharpening and things like that don't show any CPU activity. Selective edits is one of the areas that seem to benefit from my new computer, but I don't know if that speed up is coming from "Quad core", three memory busses or the installed 16 GByte RAM. I'd suspect that all of those help ;-)
A decent harddisk should be able to transfer about 100 MByte/s. If disk transfer rate is much below that I would not expect RAID 0 or SAS disks would speed up your work. An SSD is a different thing. SSDs have very short access times and that may have an effect.
File sizes may play an important role. Some of us use P65+ and some use much less demanding equipment. My experience is mostly based on full frame DSLR with about 24 MPixels. Would I use a P65 and generate TIFFs using Capture One or DxO disk speed may play a bigger role.
Best regards
Erik
Perhaps some of the bottleneck isn't due to the lack of hyperthreading and use of multiple cores - I can't think of a better expert on this than Eric since he is involved in writing some of the code so I think he's answered the question.
I think drive access is signifiant. To maximize performance a multiple drive raid o system, maybe even SAS 15k rpm drives with lots of ram would valuable. Then you may actually be able to get enough data off of the drive to supply those cores.
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No...what's your point?
Again, let me be even more clear, you are a friggin' idiot if you don't pay attention to every single word Eric may have to say...
Is that more clear?
(oh, is that not what you meant?)
:~)
lol
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I just tried doing some stuff in the develop module in LR3 b2 and it surely using both cores on my Core 2 Duo, so I would think I would benefit from going to a Quadcore. Obviously an i7 CPU would be the best, but then I will have to get new mobo and RAM to, not to mention reinstalling Windows 7. I am therefore looking at a Q9550s.
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I just tried doing some stuff in the develop module in LR3 b2 and it surely using both cores on my Core 2 Duo, so I would think I would benefit from going to a Quadcore. Obviously an i7 CPU would be the best, but then I will have to get new mobo and RAM to, not to mention reinstalling Windows 7. I am therefore looking at a Q9550s.
Just to be clear, if you go from a 2 core to a 4 core processor, you will need to reinstall Win 7 anyway.
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No...what's your point?
Again, let me be even more clear, you are a friggin' idiot if you don't pay attention to every single word Eric may have to say...
Is that more clear?
(oh, is that not what you meant?)
Ah.....the volcano just erupted again or did it spit you out?
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Just to be clear, if you go from a 2 core to a 4 core processor, you will need to reinstall Win 7 anyway.
I don't think so.
http://www.sevenforums.com/installation-se...-quad-core.html (http://www.sevenforums.com/installation-setup/63271-upgrading-dual-core-quad-core.html)
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I don't think so.
http://www.sevenforums.com/installation-se...-quad-core.html (http://www.sevenforums.com/installation-setup/63271-upgrading-dual-core-quad-core.html)
You certainly don't. I upgraded from 8 cores to 12 one one workstation and on my personal computer from 2 to 4 without any problems.
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Following up on Eric's expert advice on how the application is actually programmed to work on the image, there is a subsidiary question I'm not too clear on about the role of hard drives. My understanding is that they don't affect image editing unless recourse to the scratch disk is required because of inadequate physical and virtual RAM, because the image is called-up into RAM for editing. But the hard drives do come into play for calling-up the image in the first place and then re-saving it. I find with my dual core 3 GHz Xeon 5160s that these processes are not fast. Opening an image upwards of 120 MB and resaving it takes enough time to call-up Photoshop's "Progress" bars - never a good sign of computing efficiency. For my Phase-1 files, there's time for coffee or relief therefrom So I'm hoping that an upgrade to a 4 or 8 core system (probably a Mac this time) would improve file movement to a very noticeable extent, along with other tasks.
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Hi Mark, moving up to a faster drive should help you, because the base (and edited) images themselves are large in your case. So even if you have plenty of RAM and plenty of cores, you're likely limited by how fast you can read the darn file off the disk (and write it back to the disk).
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Hi Mark, moving up to a faster drive should help you, because the base (and edited) images themselves are large in your case. So even if you have plenty of RAM and plenty of cores, you're likely limited by how fast you can read the darn file off the disk (and write it back to the disk).
Thanks Eric, good point. If I wait long enough maybe I'll be able to get good SSDs in a high-powered desktop. That should be awesome.
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Ok, so I got my Q9650 installed and made a 20min. video about Lightroom performance with Core 2 Duo vs Quad Core at same clock speed.
I was actually surprised at how well Lightroom uses the quad core...
VIDEO: http://www.vimeo.com/11378426 (http://www.vimeo.com/11378426)