Ember 2.13.4 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1736613 bytes (1,695.9k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 501146 bytes (489.4k, 29%).

After GZIP compression these minified files vary in size:

Boot	160085 bytes (156.3k)	CDN
cdnjs	131718 bytes (128.6k)	CDN
gzip -6 (default)	130012 bytes (127.0k)	local copy
gzip -9	129511 bytes (126.5k)	local copy
7zip -mx=9 -tgzip	124947 bytes (122.0k)	local copy
zultra	124915 bytes (122.0k)	local copy
libdeflate -12	124853 bytes (121.9k)	local copy
pigz -11 -n	124804 bytes (121.9k)	local copy
kzip -s0 -rn -b2	124683 bytes (121.8k)	local copy
Zopfli	124629 bytes (121.7k)	local copy
Zopfli (defluff)	124626 bytes (121.7k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-2.13.4.min.js (or via HTTPS)

You will automatically get the smallest Ember 2.13.4 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 7089 bytes by using my Ember 2.13.4 Zopfli version instead of the best available CDN (5.69% smaller than cdnjs, 124629 vs. 131718 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 --mls2048 --bsr18 --lazy --ohh

(found July 11, 2017)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	2048	--mls2048
block splitting recursion	18	--bsr18
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 3 more bytes (124626 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/v2.13.4/ember.min.js --location | md5sum
44f9ac5b98921ddd51473c9b6395b793 -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.13.4.min.zopfli.js.gz | md5sum
44f9ac5b98921ddd51473c9b6395b793 -

SHA1:
curl --silent --compressed https://builds.emberjs.com/tags/v2.13.4/ember.min.js --location | sha1sum
8c02373a19084dc71880ba6191ec1f9adf1d2250 -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.13.4.min.zopfli.js.gz | sha1sum
8c02373a19084dc71880ba6191ec1f9adf1d2250 -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	160085 bytes	44f9ac5b98921ddd51473c9b6395b793	July 9, 2017 @ 04:32
cdnjs	131718 bytes	44f9ac5b98921ddd51473c9b6395b793	July 5, 2017 @ 18:33

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
124629 bytes	-2 bytes	zopfli --i1000000 --mls2048 --bsr18 --lazy --ohh	July 11, 2017 @ 14:08
124631 bytes	-2 bytes	zopfli --i100000 --mls2 --bsr14 --lazy --ohh	July 10, 2017 @ 21:17
124633 bytes	-1 byte	zopfli --i100000 --mls2048 --bsr18 --lazy --ohh	July 10, 2017 @ 15:56
124634 bytes	-3 bytes	zopfli --i10000 --mls2048 --bsr18 --lazy --ohh	July 8, 2017 @ 20:43
124637 bytes	-1 byte	zopfli --i10000 --mls2 --bsr14 --lazy --ohh	July 8, 2017 @ 02:40
124638 bytes	-2 bytes	zopfli --i10000 --mls16 --bsr14 --lazy --ohh	July 8, 2017 @ 02:29
124640 bytes	-3 bytes	zopfli --i10000 --mls1024 --bsr25 --lazy --ohh	July 8, 2017 @ 02:08
124643 bytes	-4 bytes	zopfli --i10000 --mls128 --bsr18 --lazy --ohh	July 8, 2017 @ 01:46
124647 bytes	-2 bytes	zopfli --i10000 --mls2 --bsr17 --lazy --ohh	July 8, 2017 @ 01:35
124649 bytes	-1 byte	zopfli --i1000 --mls1024 --bsr25 --lazy --ohh	July 7, 2017 @ 19:38
124650 bytes	-9 bytes	zopfli --i1000 --mls16 --bsr14 --lazy --ohh	July 7, 2017 @ 19:01
124659 bytes	-17 bytes	zopfli --i1000 --mls8 --bsr9 --lazy --ohh	July 7, 2017 @ 18:59
124676 bytes	–	zopfli --i100 --mls16 --bsr14 --lazy --ohh	July 7, 2017 @ 17:33

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, 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	124675	124670	124665	124663	124652	124655	124639	124670	124651	124652	124652	124657	124668	124650	124661
4	124658	124658	124650	124649	124643	124643	124653	124651	124643	124659	124643	124640	124654	124659	124656
6	124653	124657	124650	124645	124643	124643	124647	124654	124643	124658	124651	124664	124657	124658	124661
7	124657	124656	124679	124653	124653	124652	124657	124657	124642	124645	124643	124643	124664	124657	124651
8	124645	124646	124643	124652	124647	124653	124645	124644	124648	124651	124644	124644	124664	124647	124644
9	124675	124644	124647	124642	124643	124644	124658	124648	124639	124638	124655	124654	124647	124653	124645
10	124652	124654	124648	124652	124654	124650	124652	124648	124647	124634	124643	124651	124663	124663	124657
11	124642	124655	124651	124644	124646	124653	124648	124647	124641	124639	124639	124656	124653	124662	124648
12	124645	124653	124650	124653	124662	124656	124649	124647	124640	124648	124643	124648	124649	124653	124662
13	124642	124641	124649	124643	124647	124647	124649	124649	124646	124638	124645	124647	124649	124652	124646
14	124629	124639	124652	124638	124648	124651	124643	124648	124649	124646	124642	124642	124656	124662	124667
15	124648	124643	124642	124646	124648	124647	124649	124648	124644	124649	124649	124647	124656	124669	124650
16	124648	124652	124648	124647	124643	124649	124651	124648	124650	124653	124651	124648	124658	124662	124672
17	124647	124645	124641	124642	124650	124644	124648	124647	124640	124650	124648	124647	124658	124667	124662
18	124647	124646	124646	124645	124651	124651	124643	124646	124645	124675	124629	124648	124665	124664	124651
19	124641	124644	124640	124642	124648	124643	124642	124648	124647	124643	124642	124648	124653	124657	124660
20	124650	124645	124646	124651	124647	124647	124649	124650	124648	124650	124649	124654	124656	124663	124657
21	124645	124648	124647	124653	124648	124648	124650	124647	124647	124645	124644	124644	124658	124663	124649
22	124651	124644	124639	124644	124661	124644	124649	124650	124647	124645	124645	124648	124659	124657	124660
23	124648	124653	124653	124656	124646	124650	124650	124648	124647	124645	124648	124647	124653	124663	124655
25	124648	124645	124649	124646	124647	124644	124650	124648	124648	124640	124634	124642	124656	124663	124655
30	124638	124642	124640	124647	124650	124648	124648	124648	124646	124648	124648	124647	124658	124657	124651
40	124659	124666	124651	124644	124647	124643	124651	124650	124647	124645	124646	124642	124645	124659	124666

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	124676 bytes	–	100%
1,000	124649 bytes	-27 bytes	100%
10,000	124634 bytes	-15 bytes	100%
100,000	124631 bytes	-3 bytes	1.16%
1,000,000	124629 bytes	-2 bytes	0.58%
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)	124685 bytes	+56 bytes (+0.04%)	+2 bytes
1	124701 bytes	+72 bytes (+0.06%)	+18 bytes
2	124683 bytes	+54 bytes (+0.04%)	–
3	124710 bytes	+81 bytes (+0.06%)	+27 bytes
4	124747 bytes	+118 bytes (+0.09%)	+64 bytes
5	124798 bytes	+169 bytes (+0.14%)	+115 bytes
6	124828 bytes	+199 bytes (+0.16%)	+145 bytes
7	124839 bytes	+210 bytes (+0.17%)	+156 bytes
8	124865 bytes	+236 bytes (+0.19%)	+182 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	85431 bytes	-39198 bytes (-31.45%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	92432 bytes	-32197 bytes (-25.83%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	99877 bytes	-24752 bytes (-19.86%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	106051 bytes	-18578 bytes (-14.91%)
Brotli (Wikipedia)	brotli	brotli -q 11	108569 bytes	-16060 bytes (-12.89%)
LZMA2 (Wikipedia)	xz	xz -9	110436 bytes	-14193 bytes (-11.39%)
Zstandard (Wikipedia)	zstd	zstd -19	113608 bytes	-11021 bytes (-8.84%)

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.