ZIP Compression Using Pure Visual Basic

[chemicalNova]

MSVBVM60.DLL or MSVBVM50.DLL ring a bell? - In other words you'll always be depending on external files to run your projects. One more or less doesn't really make a difference

Technically, 1 less would make a difference

chem

[RhinoBull]

this is childish ,silly and stubborn

That's a qoute of from neg rep comments someone (probably rm_03 - sorry if not) gave me for my post in this thread (last prior to this) so it is silly to rep for an opinion. BTW, I don't really give a damn thing about it.

Anyway, that sample really proves nothing but what I previously said: there were plenty of attempts but non of them performed like Winzip, RAR or say PKZip and that's what matters. I did say that VB "isn't capable" so maybe I should've had said "lousy performer" in this regards instead, well ... perhaps ...
Also, as Merri pinted out Winzip, RAR and others use "ASM optimized code" so there is no way to beat that performance and it's a most important thing: who's going to use your pure VB compressor if it takes 30 min when it may 30 sec ... And you call that "childish ,silly and stubborn"? Stubborn maybe, but certainly not childish and/or silly.

My best regards - especially to the person who neg rep me.

[Merri]

Also, as Merri pinted out Winzip, RAR and others use "ASM optimized code" so there is no way to beat that performance and it's a most important thing: who's going to use your pure VB compressor if it takes 30 min when it may 30 sec

Maybe more like 40 - 60 seconds than 30 minutes (thus somewhat identical to pure C/C++ implementation). With proper optimizations you can do "miracles". A lot of ZIP compression is just low level math which can be done real fast no matter what the language. With ASM you can just get much more control over it as there are more specific commands one can use... it just takes darn long to write it all in ASM.

[Devion]

Maybe more like 40 - 60 seconds than 30 minutes (thus somewhat identical to pure C/C++ implementation). With proper optimizations you can do "miracles". A lot of ZIP compression is just low level math which can be done real fast no matter what the language. With ASM you can just get much more control over it as there are more specific commands one can use... it just takes darn long to write it all in ASM.

The time you are busy making it in asm you get back by the fast computations done