But then simple solution will be to, first, get a substring, and only then decode it

Okay, great. But I don't understand how decoding utf16le works on the data returned by cc8compt() which contains 4-byte integers? 3 * width * height of them?

Ie. a 10x10 image that looks like this (. is white * is black):

..........
.*.******.
.*........
.*.*.****.
.*.*......
.*.*.****.
.*.*.*....
.*.*.*....
.*.*.*....
..........

[download]

Comes back from cc8compt()->get_dataref as a 1200 byte string (10*10*4*3), and contains three identical copies of the 'color map' that looks like this when unpacked as 'V*'

0:0:0:0:0:0:0:0:0:0
0:1:0:2:2:2:2:2:2:0
0:1:0:0:0:0:0:0:0:0
0:1:0:3:0:4:4:4:4:0
0:1:0:3:0:0:0:0:0:0
0:1:0:3:0:5:5:5:5:0
0:1:0:3:0:5:0:0:0:0
0:1:0:3:0:5:0:0:0:0
0:1:0:3:0:5:0:0:0:0
0:0:0:0:0:0:0:0:0:0
0:0:0:0:0:0:0:0:0:0
0:1:0:2:2:2:2:2:2:0
0:1:0:0:0:0:0:0:0:0
0:1:0:3:0:4:4:4:4:0
0:1:0:3:0:0:0:0:0:0
0:1:0:3:0:5:5:5:5:0
0:1:0:3:0:5:0:0:0:0
0:1:0:3:0:5:0:0:0:0
0:1:0:3:0:5:0:0:0:0
0:0:0:0:0:0:0:0:0:0
0:0:0:0:0:0:0:0:0:0
0:1:0:2:2:2:2:2:2:0
0:1:0:0:0:0:0:0:0:0
0:1:0:3:0:4:4:4:4:0
0:1:0:3:0:0:0:0:0:0
0:1:0:3:0:5:5:5:5:0
0:1:0:3:0:5:0:0:0:0
0:1:0:3:0:5:0:0:0:0
0:1:0:3:0:5:0:0:0:0
0:0:0:0:0:0:0:0:0:0

[download]
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In reply to Re^5: Why this code is so slow if run in thread? by BrowserUk
in thread Why this code is so slow if run in thread? by vr

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