Hi

It's a repeated task for many buf-strings of fixed length to convert?

If yes, you may wanna try to pack(unpack $string) such that each byte is transformed to the highbyte of a 16-bit word and the lowbyte is 0.

Then just "or" with constant string with the "fixed byte" at lowbyte positions (that are 1,3,5..., the odd indexes).

Should be faster since you avoid looping bytewise on the perl level... but I have no time to try it out now.

Cheers Rolf

Update: corrected

In reply to Re: Interleaving bytes in a string quickly by LanX
in thread Interleaving bytes in a string quickly by BrowserUk

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