Ember 2.8.3 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1614813 bytes (1,577.0k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 419618 bytes (409.8k, 26%).

After GZIP compression these minified files vary in size:

Boot	136675 bytes (133.5k)	CDN
cdnjs	112081 bytes (109.5k)	CDN
gzip -6 (default)	110505 bytes (107.9k)	local copy
gzip -9	110147 bytes (107.6k)	local copy
7zip -mx=9 -tgzip	106304 bytes (103.8k)	local copy
zultra	106264 bytes (103.8k)	local copy
pigz -11 -n	106172 bytes (103.7k)	local copy
libdeflate -12	106086 bytes (103.6k)	local copy
kzip -s0 -rn -b1	105960 bytes (103.5k)	local copy
Zopfli	105922 bytes (103.4k)	local copy
Zopfli (defluff)	105921 bytes (103.4k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-2.8.3.min.js (or via HTTPS)

You will automatically get the smallest Ember 2.8.3 file, ETag caching is available and
if your browser doesn't support GZIP decompression then the uncompressed version will be sent.

Currently best Zopfli settings

Save 6159 bytes by using my Ember 2.8.3 Zopfli version instead of the best available CDN (5.81% smaller than cdnjs, 105922 vs. 112081 bytes):

Download

You can use my super-compressed files for whatever purpose you like as long as you respect the library's original license agreement.
There are no restrictions from my side - but please avoid hot-linking if you run a high-traffic website.

These command-line settings yielded the best compression ratio so far (Linux version of zopfli-krzymod):
zopfli --i100000 --mb8 --mls2048 --bsr6 --lazy --ohh

(found November 9, 2016)

Description	Value	Parameter
iterations	100000	--i100000
maximum blocks	8	--mb8
maximum length score	2048	--mls2048
block splitting recursion	6	--bsr6
lazy matching in LZ77	yes	--lazy
optimized Huffman headers	yes	--ohh
initial random W for iterations	1	--rw1
initial random Z for iterations	2	--rz2

Even Smaller Files Thanks To Defluff

Zopfli's output can be further optimized by the defluff tool.
In this particular case, defluff saves 1 more byte (105921 bytes).

Download

Verify file integrity

After decompression, my uncompressed files are identical to the original ones:

MD5:
curl --silent --compressed https://builds.emberjs.com/tags/v2.8.3/ember.min.js --location | md5sum
c63e08ec301ee2f5b3824a00b4895cbe -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.8.3.min.zopfli.js.gz | md5sum
c63e08ec301ee2f5b3824a00b4895cbe -

SHA1:
curl --silent --compressed https://builds.emberjs.com/tags/v2.8.3/ember.min.js --location | sha1sum
3065ceedfa6dc4aaf9b08cad37ebad25ce36378f -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.8.3.min.zopfli.js.gz | sha1sum
3065ceedfa6dc4aaf9b08cad37ebad25ce36378f -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	136675 bytes	c63e08ec301ee2f5b3824a00b4895cbe	November 4, 2016 @ 12:58
cdnjs	112081 bytes	c63e08ec301ee2f5b3824a00b4895cbe	November 2, 2016 @ 15:47

Note: only the MD5 hashes are shown to keep things simple.

Other Versions

Available Ember versions at minime.stephan-brumme.com:

3.0.0,
2.18.2, 2.18.1, 2.18.0,
2.17.2, 2.17.1, 2.17.0,
2.16.2, 2.16.1, 2.16.0,
2.15.3, 2.15.2, 2.15.1, 2.15.0,
2.14.1, 2.14.0,
2.13.4, 2.13.3, 2.13.2, 2.13.1, 2.13.0,
2.12.2, 2.12.1, 2.12.0,
2.11.3, 2.11.2, 2.11.1, 2.11.0,
2.10.2, 2.10.1, 2.10.0,
2.9.1, 2.9.0,
2.8.3, 2.8.2, 2.8.1, 2.8.0,
2.7.3, 2.7.2, 2.7.1, 2.7.0,
2.6.2, 2.6.1, 2.6.0,
2.5.1, 2.5.0,
2.4.6, 2.4.5, 2.4.4, 2.4.3, 2.4.2, 2.4.1, 2.4.0,
2.3.1, 2.3.0,
2.2.2, 2.2.1, 2.2.0,
2.1.2, 2.1.1, 2.1.0,
2.0.3, 2.0.2, 2.0.1, 2.0.0,
1.13.13, 1.13.12, 1.13.11, 1.13.10, 1.13.9, 1.13.8, 1.13.7, 1.13.6, 1.13.5, 1.13.4, 1.13.3, 1.13.2, 1.13.1, 1.13.0,
1.12.2, 1.12.1, 1.12.0,
1.11.4, 1.11.3, 1.11.2, 1.11.1, 1.11.0,
1.10.1, 1.10.0,
1.9.1, 1.9.0,
1.8.1, 1.8.0,
1.7.1, 1.7.0,
1.6.1, 1.6.0,
1.5.1, 1.5.0,
1.4.0,
1.3.2, 1.3.1, 1.3.0,
1.2.2, 1.2.1, 1.2.0,
1.0.1, 1.0.0

The project site contains an overview how well these versions were compressed.
Other interesting projects are AngularJS, BackboneJS, Bootstrap, D3, Dojo, jQuery, Knockout, lodash, React, Socket.IO, ThreeJS, UnderscoreJS and Vue.

Changelog

Best Zopfli parameters so far:

Size	Improvement	Parameters	Found
105922 bytes	-1 byte	zopfli --i100000 --mls2048 --bsr6 --lazy --ohh	November 9, 2016 @ 14:48
105923 bytes	-12 bytes	zopfli --i10000 --mls8 --bsr23 --lazy --ohh	November 8, 2016 @ 20:32
105935 bytes	-1 byte	zopfli --i1000 --mls4 --bsr7 --lazy --ohh	November 8, 2016 @ 19:52
105936 bytes	-12 bytes	zopfli --i1000 --mls16 --bsr23 --lazy --ohh	November 8, 2016 @ 19:49
105948 bytes	–	zopfli --i100 --mls16 --bsr6 --lazy --ohh	November 8, 2016 @ 19:35

If there are multiple parameter sets yielding the same compressed size, only the first one found is shown.

Most recent activity on July 20, 2020 @ 12:50.

Heatmaps

This Zopfli heatmap visualizes how compression changes when modifying the --bsr and --mls parameter.
Cell's contents is the best filesize achieved (in bytes, hover with mouse over cells to see number of iterations).

Good parameters are green, bad are red. The best and worst are bold as well.
The brightness of the blue background color indicates how many iterations were processed:
10,000 or 100,000.

bsr \ mls	2	4	8	16	32	64	128	256	512	1024	2048	4096	8192	16384	32768
bsr \ mls	2	4	8	16	32	64	128	256	512	1024	2048	4096	8192	16384	32768
2	105933	105923	105987	105934	105986	105930	105929	105942	105934	105930	105930	105929	105935	105926	105935
4	105930	105930	105930	105925	105924	105924	105929	105923	105923	105928	105929	105923	105936	105935	105934
6	105923	105923	105923	105923	105924	105924	105923	105923	105923	105925	105922	105924	105937	105933	105936
7	105924	105923	105923	105923	105923	105923	105923	105923	105923	105930	105929	105924	105935	105932	105933
8	105929	105928	105928	105926	105934	105930	105948	105930	105924	105924	105923	105924	105934	105932	105933
9	105925	105923	105923	105923	105923	105923	105923	105923	105924	105924	105924	105948	105934	105933	105932
10	105928	105929	105923	105923	105929	105923	105923	105923	105923	105925	105924	105923	105934	105933	105935
11	105924	105923	105932	105924	105923	105923	105923	105923	105923	105925	105924	105923	105936	105932	105935
12	105925	105923	105923	105923	105923	105923	105923	105923	105924	105924	105923	105948	105935	105937	105935
13	105925	105923	105924	105929	105923	105922	105923	105923	105923	105924	105923	105924	105934	105933	105935
14	105925	105923	105923	105933	105929	105923	105923	105923	105923	105923	105923	105924	105935	105932	105933
15	105923	105923	105923	105923	105923	105923	105948	105923	105923	105930	105932	105924	105936	105931	105937
16	105923	105924	105923	105923	105923	105923	105948	105923	105924	105930	105930	105931	105932	105936	105934
17	105924	105923	105932	105924	105923	105923	105925	105923	105926	105929	105929	105930	105927	105934	105934
18	105923	105924	105923	105923	105923	105923	105923	105923	105923	105924	105923	105924	105935	105932	105934
19	105924	105923	105923	105923	105923	105923	105923	105923	105924	105930	105930	105926	105932	105934	105935
20	105923	105955	105954	105923	105923	105923	105924	105923	105924	105924	105930	105928	105934	105936	105935
21	105928	105955	105923	105933	105929	105923	105924	105923	105924	105925	105929	105923	105937	105933	105934
22	105923	105923	105923	105923	105923	105923	105923	105923	105923	105925	105923	105948	105935	105933	105935
23	105923	105923	105923	105923	105923	105923	105924	105923	105923	105925	105923	105923	105935	105938	105933
25	105925	105923	105923	105923	105923	105923	105923	105923	105923	105924	105924	105948	105935	105933	105934
30	105924	105923	105924	105923	105923	105924	105923	105923	105923	105924	105923	105924	105937	105932	105933
40	105923	105923	105924	105951	105923	105923	105923	105923	105924	105925	105924	105925	105936	105932	105935

Due to the Monte Carlo design of my search algorithm, not all parameters have reached the same number of iterations yet:

Iterations	Min. Bytes	Reduction	Coverage
100	105948 bytes	–	100%
1,000	105935 bytes	-13 bytes	100%
10,000	105923 bytes	-12 bytes	100%
100,000	105922 bytes	-1 byte	43.19%
1,000,000	–	–	–
10,000,000	–	–	–

KZIP has far less options available for tuning/optimization. I only played around with the number of blocks (parameter -n):

Blocks	Min. Bytes	Compared To Best Zopfli	Compared To Best KZIP
(any)	105972 bytes	+50 bytes (+0.05%)	+12 bytes
1	105960 bytes	+38 bytes (+0.04%)	–
2	106008 bytes	+86 bytes (+0.08%)	+48 bytes
3	105971 bytes	+49 bytes (+0.05%)	+11 bytes
4	106028 bytes	+106 bytes (+0.10%)	+68 bytes
5	106066 bytes	+144 bytes (+0.14%)	+106 bytes
6	106108 bytes	+186 bytes (+0.18%)	+148 bytes
7	106155 bytes	+233 bytes (+0.22%)	+195 bytes
8	106192 bytes	+270 bytes (+0.25%)	+232 bytes

Non-DEFLATE Algorithms

Archivers based on completely different compression algorithms often produce superior results.
Unfortunately, browsers only support gzip compression at the moment.
However, support for Brotli is constantly growing - for example, your browser actually supports it !

Algorithm	Program	Parameters	Size	Compared To Best Zopfli
ZPAQ (Wikipedia)	zpaq	zpaq -method 69	72906 bytes	-33016 bytes (-31.17%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	77835 bytes	-28087 bytes (-26.52%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	83539 bytes	-22383 bytes (-21.13%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	88723 bytes	-17199 bytes (-16.24%)
Brotli (Wikipedia)	brotli	brotli -q 11	92825 bytes	-13097 bytes (-12.36%)
LZMA2 (Wikipedia)	xz	xz -9	94892 bytes	-11030 bytes (-10.41%)
Zstandard (Wikipedia)	zstd	zstd -19	97529 bytes	-8393 bytes (-7.92%)

Detailled Analysis

I wrote a DEFLATE decoder in Javascript. Click the button below to start a client-side analysis of the smallest gzipped files (may take a second):

Load and Parse Data

Notes: pigz is a fast open source multi-threaded implementation of gzip written by one of the original authors of gzip.
However, when using compression level 11, pigz actually switches to the slower Zopfli algorithm and isn't multi-threaded anymore.
KrzyMOD's extensions to Zopfli offer the highest level of configuration and is therefore used for my brute-force search.
Ken Silverman wrote the closed-source KZIP compression program and Jonathon Fowler ported it to Linux.
Defluff was created by Joachim Henke; DeflOpt is a tool by Ben Jos Walbeehm.

website made by Stephan Brumme in 2015 and still improving in 2024.
all timestamps are displayed in central european time. see my changelog.
no flash, not even images or external css files - and everything squeezed into a single html file.
which was handsomely compressed before releasing it into the wild internet - obviously.

please visit my homepage and my blog, too.
email: minime (at) stephan-brumme.com

All trademarks are property of their respective owners. You know, the boring legal stuff.