Ember 2.6.2 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1641490 bytes (1,603.0k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 427979 bytes (417.9k, 26%).

After GZIP compression these minified files vary in size:

Boot	139355 bytes (136.1k)	CDN
cdnjs	114350 bytes (111.7k)	CDN
gzip -6 (default)	112744 bytes (110.1k)	local copy
gzip -9	112400 bytes (109.8k)	local copy
7zip -mx=9 -tgzip	108433 bytes (105.9k)	local copy
zultra	108402 bytes (105.9k)	local copy
libdeflate -12	108335 bytes (105.8k)	local copy
pigz -11 -n	108317 bytes (105.8k)	local copy
kzip -s0 -rn -b3	108146 bytes (105.6k)	local copy
Zopfli	108122 bytes (105.6k)	local copy
Zopfli (defluff)	108120 bytes (105.6k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-2.6.2.min.js (or via HTTPS)

You will automatically get the smallest Ember 2.6.2 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 6228 bytes by using my Ember 2.6.2 Zopfli version instead of the best available CDN (5.76% smaller than cdnjs, 108122 vs. 114350 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 --i1000000 --mb8 --mls16 --bsr12 --lazy --ohh

(found July 15, 2016)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	16	--mls16
block splitting recursion	12	--bsr12
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 2 more bytes (108120 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/v2.6.2/ember.min.js --location | md5sum
161770a8d270b6840209b9430cbe24a5 -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.6.2.min.zopfli.js.gz | md5sum
161770a8d270b6840209b9430cbe24a5 -

SHA1:
curl --silent --compressed https://builds.emberjs.com/tags/v2.6.2/ember.min.js --location | sha1sum
37c62bf76ba33ec3b6fe2ae09d7611701db37d38 -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.6.2.min.zopfli.js.gz | sha1sum
37c62bf76ba33ec3b6fe2ae09d7611701db37d38 -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	139355 bytes	161770a8d270b6840209b9430cbe24a5	July 13, 2016 @ 08:21
cdnjs	114350 bytes	161770a8d270b6840209b9430cbe24a5	July 13, 2016 @ 00:31

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
108122 bytes	-1 byte	zopfli --i1000000 --mls16 --bsr12 --lazy --ohh	July 15, 2016 @ 09:26
108123 bytes	-1 byte	zopfli --i10000 --mls16 --bsr14 --lazy --ohh	July 13, 2016 @ 13:55
108124 bytes	-1 byte	zopfli --i1000 --mls16 --bsr14 --lazy --ohh	July 13, 2016 @ 13:35
108125 bytes	-1 byte	zopfli --i1000 --mls2048 --bsr23 --lazy --ohh	July 13, 2016 @ 13:06
108126 bytes	-1 byte	zopfli --i1000 --mls4096 --bsr6 --lazy --ohh	July 13, 2016 @ 13:05
108127 bytes	-17 bytes	zopfli --i1000 --mls4096 --bsr2 --lazy --ohh	July 13, 2016 @ 13:05
108144 bytes	–	zopfli --i100 --mls4096 --bsr2 --lazy --ohh	July 13, 2016 @ 11:58

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 @ 12:51.

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 1,000,000.

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	108128	108130	108128	108130	108128	108135	108128	108126	108128	108128	108183	108127	108136	108136	108129
4	108125	108125	108126	108122	108125	108125	108125	108128	108125	108125	108125	108126	108135	108136	108134
6	108125	108125	108125	108125	108125	108124	108124	108128	108125	108124	108126	108126	108140	108139	108135
7	108124	108124	108127	108122	108126	108125	108125	108126	108125	108126	108125	108125	108137	108135	108135
8	108126	108126	108126	108122	108125	108126	108125	108126	108124	108125	108125	108125	108136	108136	108137
9	108126	108125	108127	108125	108127	108125	108125	108128	108124	108125	108125	108124	108135	108134	108134
10	108125	108125	108126	108125	108125	108124	108124	108128	108125	108124	108125	108128	108135	108133	108134
11	108125	108125	108129	108125	108125	108125	108124	108127	108125	108125	108125	108130	108135	108135	108134
12	108125	108125	108126	108122	108126	108124	108125	108126	108125	108126	108125	108124	108138	108136	108135
13	108125	108125	108126	108125	108125	108124	108125	108126	108124	108125	108125	108126	108134	108134	108133
14	108124	108124	108127	108122	108125	108125	108124	108126	108125	108126	108125	108126	108138	108133	108135
15	108124	108125	108127	108125	108125	108124	108125	108128	108125	108125	108125	108125	108134	108138	108132
16	108124	108125	108127	108124	108127	108125	108125	108128	108124	108125	108133	108128	108135	108138	108134
17	108128	108126	108127	108128	108127	108126	108125	108127	108125	108124	108125	108128	108138	108135	108133
18	108125	108125	108126	108125	108126	108125	108126	108128	108127	108126	108127	108127	108126	108133	108136
19	108125	108126	108126	108124	108127	108125	108125	108126	108125	108129	108132	108125	108134	108133	108136
20	108126	108125	108127	108125	108125	108125	108125	108128	108125	108125	108125	108125	108135	108133	108134
21	108125	108125	108126	108125	108125	108124	108124	108126	108125	108125	108125	108125	108135	108136	108136
22	108125	108125	108127	108122	108125	108125	108127	108128	108125	108125	108125	108125	108138	108134	108133
23	108125	108125	108127	108126	108127	108125	108127	108128	108125	108124	108125	108125	108138	108135	108128
25	108125	108125	108126	108122	108125	108124	108124	108128	108125	108124	108125	108125	108137	108132	108133
30	108147	108125	108127	108124	108126	108125	108127	108127	108125	108126	108124	108129	108135	108135	108134
40	108124	108125	108127	108125	108127	108126	108127	108128	108125	108125	108125	108128	108133	108133	108135

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	108144 bytes	–	100%
1,000	108124 bytes	-20 bytes	100%
10,000	108123 bytes	-1 byte	100%
100,000	108123 bytes	–	2.03%
1,000,000	108122 bytes	-1 byte	2.03%
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)	108146 bytes	+24 bytes (+0.02%)	–
1	108151 bytes	+29 bytes (+0.03%)	+5 bytes
2	108198 bytes	+76 bytes (+0.07%)	+52 bytes
3	108146 bytes	+24 bytes (+0.02%)	–
4	108220 bytes	+98 bytes (+0.09%)	+74 bytes
5	108257 bytes	+135 bytes (+0.12%)	+111 bytes
6	108311 bytes	+189 bytes (+0.17%)	+165 bytes
7	108346 bytes	+224 bytes (+0.21%)	+200 bytes
8	108383 bytes	+261 bytes (+0.24%)	+237 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	74242 bytes	-33880 bytes (-31.33%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	79225 bytes	-28897 bytes (-26.73%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	85349 bytes	-22773 bytes (-21.06%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	90262 bytes	-17860 bytes (-16.52%)
Brotli (Wikipedia)	brotli	brotli -q 11	94221 bytes	-13901 bytes (-12.86%)
LZMA2 (Wikipedia)	xz	xz -9	96372 bytes	-11750 bytes (-10.87%)
Zstandard (Wikipedia)	zstd	zstd -19	99117 bytes	-9005 bytes (-8.33%)

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.