Ember 2.8.2 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1614516 bytes (1,576.7k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 419565 bytes (409.7k, 26%).

After GZIP compression these minified files vary in size:

Boot	136658 bytes (133.5k)	CDN
cdnjs	112082 bytes (109.5k)	CDN
gzip -6 (default)	110508 bytes (107.9k)	local copy
gzip -9	110149 bytes (107.6k)	local copy
7zip -mx=9 -tgzip	106308 bytes (103.8k)	local copy
zultra	106268 bytes (103.8k)	local copy
pigz -11 -n	106181 bytes (103.7k)	local copy
libdeflate -12	106100 bytes (103.6k)	local copy
kzip -s0 -rn -b3	105969 bytes (103.5k)	local copy
Zopfli	105926 bytes (103.4k)	local copy
Zopfli (defluff)	105925 bytes (103.4k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-2.8.2.min.js (or via HTTPS)

You will automatically get the smallest Ember 2.8.2 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 6156 bytes by using my Ember 2.8.2 Zopfli version instead of the best available CDN (5.81% smaller than cdnjs, 105926 vs. 112082 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 --i10000 --mb8 --mls16 --bsr9 --lazy --ohh

(found October 11, 2016)

Description	Value	Parameter
iterations	10000	--i10000
maximum blocks	8	--mb8
maximum length score	16	--mls16
block splitting recursion	9	--bsr9
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 (105925 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/v2.8.2/ember.min.js --location | md5sum
ed480c235d426b2ccc81fd1532555145 -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.8.2.min.zopfli.js.gz | md5sum
ed480c235d426b2ccc81fd1532555145 -

SHA1:
curl --silent --compressed https://builds.emberjs.com/tags/v2.8.2/ember.min.js --location | sha1sum
80dc7ef6d931328b59499431e2ec8152e48e9050 -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.8.2.min.zopfli.js.gz | sha1sum
80dc7ef6d931328b59499431e2ec8152e48e9050 -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	136658 bytes	ed480c235d426b2ccc81fd1532555145	October 9, 2016 @ 06:25
cdnjs	112082 bytes	ed480c235d426b2ccc81fd1532555145	October 7, 2016 @ 03:17

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
105926 bytes	-1 byte	zopfli --i10000 --mls16 --bsr9 --lazy --ohh	October 11, 2016 @ 19:46
105927 bytes	-1 byte	zopfli --i10000 --mls2 --bsr12 --lazy --ohh	October 11, 2016 @ 15:42
105928 bytes	-10 bytes	zopfli --i10000 --mls2 --bsr16 --lazy --ohh	October 11, 2016 @ 08:47
105938 bytes	-1 byte	zopfli --i1000 --mls2 --bsr16 --lazy --ohh	October 11, 2016 @ 06:27
105939 bytes	-10 bytes	zopfli --i1000 --mls4 --bsr11 --lazy --ohh	October 11, 2016 @ 06:18
105949 bytes	–	zopfli --i100 --mls4096 --bsr8 --lazy --ohh	October 11, 2016 @ 05:48

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 @ 12:49.

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	105928	105928	105933	105938	105990	105933	105933	105933	105937	105934	105932	105932	105953	105930	105937
4	105931	105930	105934	105930	105928	105929	105933	105928	105929	105930	105933	105927	105940	105938	105939
6	105928	105927	105928	105928	105951	105929	105933	105928	105928	105929	105928	105929	105941	105937	105940
7	105950	105950	105928	105928	105928	105928	105928	105928	105928	105931	105933	105929	105939	105936	105937
8	105934	105933	105933	105930	105933	105934	105932	105934	105930	105928	105928	105929	105938	105936	105937
9	105927	105928	105928	105926	105928	105928	105928	105928	105927	105928	105928	105928	105936	105937	105936
10	105932	105933	105928	105928	105932	105928	105933	105928	105927	105929	105928	105929	105938	105937	105940
11	105929	105928	105928	105928	105928	105928	105928	105928	105928	105929	105929	105929	105939	105936	105939
12	105927	105928	105928	105928	105927	105928	105928	105928	105927	105928	105928	105928	105939	105940	105939
13	105927	105928	105928	105926	105927	105928	105928	105927	105928	105928	105928	105929	105936	105937	105940
14	105927	105928	105928	105954	105928	105928	105928	105928	105928	105927	105928	105929	105939	105935	105937
15	105928	105927	105928	105928	105928	105928	105928	105928	105928	105931	105934	105929	105939	105935	105942
16	105928	105928	105939	105928	105928	105928	105928	105927	105927	105931	105932	105934	105936	105941	105939
17	105928	105928	105928	105929	105928	105928	105929	105928	105932	105931	105932	105933	105931	105937	105939
18	105928	105928	105928	105928	105928	105928	105928	105927	105928	105927	105928	105929	105938	105935	105939
19	105929	105928	105928	105928	105928	105928	105928	105927	105927	105931	105932	105930	105939	105937	105939
20	105928	105959	105958	105928	105928	105928	105928	105927	105927	105929	105933	105932	105938	105940	105939
21	105932	105959	105928	105936	105932	105928	105932	105928	105927	105929	105933	105927	105940	105936	105939
22	105928	105927	105928	105928	105928	105928	105933	105928	105928	105929	105928	105928	105939	105937	105939
23	105928	105927	105926	105928	105928	105928	105928	105928	105928	105929	105928	105928	105939	105941	105938
25	105927	105928	105928	105928	105929	105929	105928	105928	105928	105929	105928	105928	105937	105937	105938
30	105929	105927	105928	105928	105928	105929	105928	105928	105928	105930	105928	105929	105940	105936	105939
40	105928	105928	105928	105926	105928	105928	105928	105928	105927	105929	105928	105929	105940	105935	105939

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	105949 bytes	–	100%
1,000	105938 bytes	-11 bytes	100%
10,000	105926 bytes	-12 bytes	100%
100,000	105926 bytes	–	10.14%
1,000,000	105926 bytes	–	1.16%
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)	105986 bytes	+60 bytes (+0.06%)	+17 bytes
1	105972 bytes	+46 bytes (+0.04%)	+3 bytes
2	106015 bytes	+89 bytes (+0.08%)	+46 bytes
3	105969 bytes	+43 bytes (+0.04%)	–
4	106027 bytes	+101 bytes (+0.10%)	+58 bytes
5	106076 bytes	+150 bytes (+0.14%)	+107 bytes
6	106122 bytes	+196 bytes (+0.19%)	+153 bytes
7	106146 bytes	+220 bytes (+0.21%)	+177 bytes
8	106208 bytes	+282 bytes (+0.27%)	+239 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	72907 bytes	-33019 bytes (-31.17%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	77832 bytes	-28094 bytes (-26.52%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	83530 bytes	-22396 bytes (-21.14%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	88664 bytes	-17262 bytes (-16.30%)
Brotli (Wikipedia)	brotli	brotli -q 11	92776 bytes	-13150 bytes (-12.41%)
LZMA2 (Wikipedia)	xz	xz -9	94928 bytes	-10998 bytes (-10.38%)
Zstandard (Wikipedia)	zstd	zstd -19	97514 bytes	-8412 bytes (-7.94%)

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 2026.
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.