I wrote a tar implementation /g/ that is slower than GNU Tar by 400ms. I...Is.....is that bad /g/? :S
>>54325383
isn't tar just this?cat filea fileb filec > derp.tar
>>54325562
No. tar is a fucking mess. There is a total of 5 different standards, and at least 3 types of headers.
A tar file is consisted of 512 byte blocks of files+headers+fill of zeros.
Ther zeroes are needed so that total number of bytes % 512 == 0
+ all shit for some reason is in octal in the headers, so a shitton of conversion is needed, thats why mine is so slow
>>54325562
Lolnope. You're talking about concatenation. Why would we need tar if cat can do it?
>>54325694
>>54325632
but... it's basically file concatenation with a header, right? sure, it has the compression stuff built in but you can just pipe to gzip.
>>54325383
On how big a file?
What percent slower?
Looks to be about half as fast, which is pretty damn good.
>>54325975
I use tar when I need to backup a folder in one file and then restore it as is. Cat can't recursively backup a full tree of folders and files, can it?
>>54326012
Chromium, which is around...200MB probably?
>>54326075
My point isn't that. tar is bottle-necked by file read and write speed. Any "enhancements" you can make to it won't matter at all.
Also, I'm sure I can think of a one line tar-like implementation in bash.cat $(find -type f .) > derp.mydumbtar
>>54326075
Guys wtf you cant cat files together. How will you unCat them? How do you know which file is where? :'D
>>54326214
Pretty cool.
Does it handle more files than ram allows, and only load what it's working on?
>>54326217
You cant do that because you cant keep file owners, time info, file permissions etc.
>>54326249
Yes thats what it does. Of allocated ~50MB of RAM, it uses around 10MB while extracting a 200MB file.
>>54326236
> Guys wtf you cant cat files together. How will you unCat them?
Uhhh, you're right, it's hard to split them later, but not impossible. However, sometimes it's useful: http://nginx.org/en/docs/http/configuring_https_servers.html#chains
Uhhh Java ? I see where the delay is coming from
