XnView Software

I don't recall having this issue with earlier versions of NConvert, but I'm seeing very slow performance when processing files off a network drive.

These are big JPEGs (7,000x14,000 px), so a 6s processing time seems reasonable. That is what I get off my local drive, but when I run them off the network it takes around 4 times as long - much longer than copying the files locally (to a temp folder) and then converting them.

Can you give me a better idea about what the program is doing to handle big files - or what I could be doing to improve performance off a network drive?

Test results:

Local files:
C:\CmdApps\test bigs\Image 1.jpg: 5969ms
C:\CmdApps\test bigs\Image 2.jpg: 5853ms
C:\CmdApps\test bigs\Image 3.jpg: 5946ms
C:\CmdApps\test bigs\Image 4.jpg: 5791ms

Network files:
G:\Network Location\Image 1.jpg: 22678ms
G:\Network Location\Image 2.jpg: 25331ms
G:\Network Location\Image 3.jpg: 24844ms
G:\Network Location\Image 4.jpg: 21366ms

2 steps: copy to temp then process

G:\Network Location\Image 1.jpg (copying): 4807ms
C:\Users\me\AppData\Local\Temp\634211970528857048\Image 1.jpg: 5862ms

G:\Network Location\Image 2.jpg (copying): 3763ms
C:\Users\me\AppData\Local\Temp\634211970644518613\Image 2.jpg: 5845ms

G:\Network Location\Image 3.jpg (copying): 3924ms
C:\Users\me\AppData\Local\Temp\634211970745058666\Image 3.jpg: 5851ms

G:\Network Location\Image 4.jpg (copying): 2130ms
C:\Users\me\AppData\Local\Temp\634211970847198879\Image 4.jpg: 5702ms

goulding wrote:These are big JPEGs (7,000x14,000 px), so a 6s processing time seems reasonable.

"Reasonable"? In my world that would be fantastic for files that size. Out of curiosity, what hardware are you running?

Also, if your environment is Win7, there is a known issue you might check into:

Go here.

Dell M4500 (8GB ram, i7 quad) - yeah its pretty fast for a laptop, but battery life suffers!

Thanks for the Win7 “Remote Differential Compression” tip. I'm now seeing insanely high processing times when I access the file off the network (over 2 minutes) whether I have it turned on or not! So its not easy to know what effect that option has, but its definitely something to try...