Large Jpgs Are Loading Very Slow Options

[hanno s]

Hi,

and first of all many thanks to Peter for his great program for OS/2 and eCS.

I would like to ask, if there is a possibility to speed up loading of JPG-files?

JPG-pictures (size 2016x3024, about 2,3 MB) need about 8 s to load.
The same picture as TIFF (17,4 MB) needs less than 1 s.

Also the OS/2 built-in picture-viewer loads much faster than PMView.

Because of the picturesize, PMView has to shrink the picture to 40% to display. If no zooming is used, loading is faster.
(There is no interpolation).

Any hints?

Kind regards
Hanno

[Peter]

Hi,

and first of all many thanks to Peter for his great program for OS/2 and eCS.

I would like to ask, if there is a possibility to speed up loading of JPG-files?

JPG-pictures (size 2016x3024, about 2,3 MB) need about 8 s to load.
The same picture as TIFF (17,4 MB) needs less than 1 s.

Also the OS/2 built-in picture-viewer loads much faster than PMView.

Because of the picturesize, PMView has to shrink the picture to 40% to display. If no zooming is used, loading is faster.
(There is no interpolation).

Any hints?

Kind regards
Hanno

Have you disabled the interpolation completely?

What CPU and speed are you using? The lastest versions of PMView are optimized for Pentium II and above. The JPEG codec works with floating point instead of integer arithmetic, and assembly code is removed to improve compatibity.

If loading feels too slow in PMView Pro, your best bet is probably to switch to PMView 2000 or upgrade to a faster CPU. (PMView 2000 uses integer arithmetic and some assembly to speed up JPEG reading).

Thanks,
Peter

[hanno s]

Have you disabled the interpolation completely?

What CPU and speed are you using? The lastest versions of PMView are optimized for Pentium II and above. The JPEG codec works with floating point instead of integer arithmetic, and assembly code is removed to improve compatibity.

If loading feels too slow in PMView Pro, your best bet is probably to switch to PMView 2000 or upgrade to a faster CPU. (PMView 2000 uses integer arithmetic and some assembly to speed up JPEG reading).

Thanks,
Peter

Hi,

and thanks for your answer. I have disabled interpolation within the settings (is that "completely"?). But there is no significant change concerning the loadingtime. The difference between tif and jpg pictures is the same.

CPU speed is 3 GHz with an Intel Pent. IV, 1 GB memory

>probably to switch to PMView 200
Do you mean the old version of PMView? Should this be faster?

But again: The eCS-pictureviewer load tif and jpg faster, both with SAME speed.

Thanks in advance for your help
Hanno

PS: I am sure you are able to reproduce this problem: Compare loadingtime for 2000x3000, 6Mb JPG-pictures with 2000x30000, 17Mb TIFF-pictures.