Ember 2.4.3 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1718038 bytes (1,677.8k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 458128 bytes (447.4k, 27%).

After GZIP compression these minified files vary in size:

Boot	144693 bytes (141.3k)	CDN
cdnjs	118829 bytes (116.0k)	CDN
gzip -6 (default)	116989 bytes (114.2k)	local copy
gzip -9	116592 bytes (113.9k)	local copy
libdeflate -12	112849 bytes (110.2k)	local copy
7zip -mx=9 -tgzip	112798 bytes (110.2k)	local copy
zultra	112718 bytes (110.1k)	local copy
pigz -11 -n	112535 bytes (109.9k)	local copy
kzip -s0 -rn -b5	112440 bytes (109.8k)	local copy
Zopfli	112338 bytes (109.7k)	local copy
Zopfli (defluff)	112336 bytes (109.7k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-2.4.3.min.js (or via HTTPS)

You will automatically get the smallest Ember 2.4.3 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 6491 bytes by using my Ember 2.4.3 Zopfli version instead of the best available CDN (5.78% smaller than cdnjs, 112338 vs. 118829 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 --mls64 --bsr14 --lazy --ohh

(found March 20, 2016)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	64	--mls64
block splitting recursion	14	--bsr14
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 (112336 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/v2.4.3/ember.min.js --location | md5sum
53abf6b7f36bd58365b99f4959ab293d -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.4.3.min.zopfli.js.gz | md5sum
53abf6b7f36bd58365b99f4959ab293d -

SHA1:
curl --silent --compressed https://builds.emberjs.com/tags/v2.4.3/ember.min.js --location | sha1sum
32eb609e1ffc74902ca0803e31eed6292daa5105 -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.4.3.min.zopfli.js.gz | sha1sum
32eb609e1ffc74902ca0803e31eed6292daa5105 -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	144693 bytes	53abf6b7f36bd58365b99f4959ab293d	May 3, 2016 @ 11:51
cdnjs	118829 bytes	53abf6b7f36bd58365b99f4959ab293d	March 18, 2016 @ 09:31

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
112338 bytes	-3 bytes	zopfli --i1000000 --mls64 --bsr14 --lazy --ohh	March 20, 2016 @ 12:08
112341 bytes	-4 bytes	zopfli --i100000 --mls64 --bsr14 --lazy --ohh	March 19, 2016 @ 07:33
112345 bytes	-4 bytes	zopfli --i100000 --mls64 --bsr11 --lazy --ohh	March 19, 2016 @ 05:04
112349 bytes	-4 bytes	zopfli --i10000 --mls64 --bsr11 --lazy --ohh	March 18, 2016 @ 13:46
112353 bytes	-1 byte	zopfli --i10000 --mls32 --bsr20 --lazy --ohh	March 18, 2016 @ 13:23
112354 bytes	-6 bytes	zopfli --i10000 --mls32 --bsr30 --lazy --ohh	March 18, 2016 @ 12:55
112360 bytes	-1 byte	zopfli --i1000 --mls32 --bsr30 --lazy --ohh	March 18, 2016 @ 12:33
112361 bytes	-5 bytes	zopfli --i1000 --mls64 --bsr11 --lazy --ohh	March 18, 2016 @ 12:09
112366 bytes	-19 bytes	zopfli --i1000 --mls8 --bsr21 --lazy --ohh	March 18, 2016 @ 12:00
112385 bytes	-3 bytes	zopfli --i1000 --mls8192 --bsr6 --lazy --ohh	March 18, 2016 @ 11:59
112388 bytes	–	zopfli --i100 --mls8 --bsr21 --lazy --ohh	March 18, 2016 @ 11:51

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 @ 12:47.

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, 100,000 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	112469	112468	112470	112462	112478	112461	112483	112474	112481	112471	112476	112472	112473	112474	112477
4	112376	112375	112465	112386	112382	112371	112414	112385	112376	112421	112394	112473	112474	112381	112466
6	112369	112369	112368	112367	112383	112372	112381	112395	112376	112371	112389	112394	112374	112389	112471
7	112470	112469	112469	112465	112469	112468	112354	112465	112468	112469	112370	112389	112379	112380	112462
8	112469	112469	112469	112469	112467	112470	112354	112469	112467	112469	112364	112377	112371	112383	112466
9	112361	112469	112366	112465	112352	112466	112381	112469	112469	112469	112387	112474	112376	112464	112465
10	112363	112469	112469	112469	112352	112352	112378	112469	112468	112469	112382	112474	112387	112462	112463
11	112469	112471	112469	112469	112352	112345	112345	112469	112468	112469	112385	112475	112377	112462	112466
12	112469	112469	112469	112537	112354	112352	112381	112465	112470	112469	112383	112474	112380	112463	112463
13	112467	112471	112365	112470	112357	112415	112381	112465	112467	112469	112367	112474	112378	112462	112470
14	112362	112469	112465	112465	112360	112338	112382	112469	112469	112469	112385	112374	112379	112462	112463
15	112468	112466	112465	112465	112353	112468	112352	112469	112468	112469	112367	112380	112378	112463	112463
16	112469	112469	112469	112469	112353	112352	112383	112470	112470	112469	112364	112474	112368	112462	112461
17	112469	112469	112364	112469	112353	112467	112356	112469	112469	112469	112386	112475	112387	112465	112466
18	112361	112469	112364	112469	112353	112468	112354	112465	112468	112470	112364	112473	112366	112462	112464
19	112471	112381	112377	112472	112464	112471	112392	112471	112470	112469	112386	112475	112378	112462	112466
20	112471	112471	112472	112472	112353	112466	112357	112465	112468	112469	112385	112474	112377	112463	112461
21	112469	112469	112363	112471	112353	112415	112383	112465	112467	112469	112384	112475	112378	112463	112466
22	112374	112469	112469	112537	112351	112469	112468	112465	112468	112469	112366	112474	112379	112462	112463
23	112469	112469	112362	112469	112464	112464	112470	112469	112468	112469	112365	112475	112379	112462	112463
25	112469	112469	112469	112470	112352	112471	112352	112469	112468	112469	112367	112473	112380	112462	112464
30	112469	112469	112467	112469	112354	112345	112352	112471	112470	112470	112368	112474	112380	112462	112461
40	112469	112469	112469	112465	112360	112468	112383	112469	112469	112469	112382	112474	112379	112464	112463

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	112388 bytes	–	100%
1,000	112359 bytes	-29 bytes	100%
10,000	112349 bytes	-10 bytes	100%
100,000	112341 bytes	-8 bytes	1.16%
1,000,000	112338 bytes	-3 bytes	0.29%
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)	112536 bytes	+198 bytes (+0.18%)	+96 bytes
1	112505 bytes	+167 bytes (+0.15%)	+65 bytes
2	112547 bytes	+209 bytes (+0.19%)	+107 bytes
3	112561 bytes	+223 bytes (+0.20%)	+121 bytes
4	112471 bytes	+133 bytes (+0.12%)	+31 bytes
5	112440 bytes	+102 bytes (+0.09%)	–
6	112468 bytes	+130 bytes (+0.12%)	+28 bytes
7	112521 bytes	+183 bytes (+0.16%)	+81 bytes
8	112559 bytes	+221 bytes (+0.20%)	+119 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	76620 bytes	-35718 bytes (-31.80%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	82028 bytes	-30310 bytes (-26.98%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	88450 bytes	-23888 bytes (-21.26%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	93308 bytes	-19030 bytes (-16.94%)
Brotli (Wikipedia)	brotli	brotli -q 11	97545 bytes	-14793 bytes (-13.17%)
LZMA2 (Wikipedia)	xz	xz -9	99812 bytes	-12526 bytes (-11.15%)
Zstandard (Wikipedia)	zstd	zstd -19	102593 bytes	-9745 bytes (-8.67%)

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.