Smaller and faster data compression with Zstandard
People are creating, sharing, and storing data at a faster rate than at any other time in history. When it comes to innovating on storing and transmitting that data, at Facebook we're making advancements not only in hardware — such as larger hard drives and faster networking equipment — but in software as well. Software helps with data processing through compression, which encodes information, lik
How are zlib, gzip and zip related? What do they have in common and how are they different?
Short form: .zip is an archive format using, usually, the Deflate compression method. The .gz gzip format is for single files, also using the Deflate compression method. Often gzip is used in combination with tar to make a compressed archive format, .tar.gz. The zlib library provides Deflate compression and decompression code for use by zip, gzip, png (which uses the zlib wrapper on deflate data),
Day 16: gzip + poetry = awesome
Gzip compresses by replacing text with pointers to earlier parts of the text. Here’s a visualization of what actually happens when you decompress “The Raven”. It highlights the bits of text that are copied from previously in the poem. I showed this as a Thursday talk at Hacker School today :) I really like how you can see the rhyming inside the poem like (rapping… tapping) come out in the compress
Simple zcat(1) in Perl with Compress::Raw::Zlib - Islands in the byte stream (legacy)
Perlのzlibインターフェイスは沢山あってよく分からないが、単純に圧縮/解凍をするだけならCompress::Raw::Zlibがシンプルで良さそうだ。 これでzcat(1)を実装すると以下のようになる。 #!perl -w use strict; use Compress::Raw::Zlib; my $z = Compress::Raw::Zlib::Inflate->new( -WindowBits => WANT_GZIP, ); foreach my $file(@ARGV) { open my $fh, '<', $file or die "Cannot open $file: $!"; while(read $fh, my $buf, 1024) { my $d; my $status = $z->inflate($buf, \$d, 1); ($status == Z_
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