Ember 2.4.4 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1722234 bytes (1,681.9k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 459388 bytes (448.6k, 27%).

After GZIP compression these minified files vary in size:

Boot	145001 bytes (141.6k)	CDN
cdnjs	119031 bytes (116.2k)	CDN
gzip -6 (default)	117201 bytes (114.5k)	local copy
gzip -9	116791 bytes (114.1k)	local copy
libdeflate -12	113004 bytes (110.4k)	local copy
7zip -mx=9 -tgzip	112985 bytes (110.3k)	local copy
zultra	112914 bytes (110.3k)	local copy
pigz -11 -n	112720 bytes (110.1k)	local copy
kzip -s0 -rn -b5	112614 bytes (110.0k)	local copy
Zopfli	112535 bytes (109.9k)	local copy
Zopfli (defluff)	112532 bytes (109.9k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-2.4.4.min.js (or via HTTPS)

You will automatically get the smallest Ember 2.4.4 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 6496 bytes by using my Ember 2.4.4 Zopfli version instead of the best available CDN (5.77% smaller than cdnjs, 112535 vs. 119031 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 --mls4096 --bsr30 --lazy --ohh

(found April 6, 2016)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	4096	--mls4096
block splitting recursion	30	--bsr30
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 (112532 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/v2.4.4/ember.min.js --location | md5sum
b200d05b8c24733dfe2f919fe2f128e8 -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.4.4.min.zopfli.js.gz | md5sum
b200d05b8c24733dfe2f919fe2f128e8 -

SHA1:
curl --silent --compressed https://builds.emberjs.com/tags/v2.4.4/ember.min.js --location | sha1sum
d428cbbb5f5329b4f7bd6746aee947005b06096e -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.4.4.min.zopfli.js.gz | sha1sum
d428cbbb5f5329b4f7bd6746aee947005b06096e -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	145001 bytes	b200d05b8c24733dfe2f919fe2f128e8	May 3, 2016 @ 11:51
cdnjs	119031 bytes	b200d05b8c24733dfe2f919fe2f128e8	April 3, 2016 @ 19:01

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
112535 bytes	-1 byte	zopfli --i1000000 --mls4096 --bsr30 --lazy --ohh	April 6, 2016 @ 07:21
112536 bytes	-1 byte	zopfli --i1000000 --mls32 --bsr30 --lazy --ohh	April 6, 2016 @ 06:36
112537 bytes	-15 bytes	zopfli --i100000 --mls32 --bsr30 --lazy --ohh	April 4, 2016 @ 08:54
112552 bytes	-3 bytes	zopfli --i10000 --mls32 --bsr30 --lazy --ohh	April 4, 2016 @ 06:45
112555 bytes	-6 bytes	zopfli --i1000 --mls32 --bsr30 --lazy --ohh	April 4, 2016 @ 06:26
112561 bytes	-20 bytes	zopfli --i1000 --mls8192 --bsr19 --lazy --ohh	April 4, 2016 @ 06:26
112581 bytes	–	zopfli --i100 --mls8192 --bsr8 --lazy --ohh	April 4, 2016 @ 06:18

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 @ 12:53.

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	112662	112663	112652	112660	112655	112677	112672	112671	112665	112668	112664	112664	112663	112667	112667
4	112565	112568	112663	112581	112580	112572	112573	112574	112580	112587	112580	112672	112671	112578	112660
6	112560	112552	112562	112558	112577	112591	112594	112575	112567	112667	112580	112672	112668	112572	112585
7	112662	112664	112666	112666	112670	112663	112575	112664	112670	112666	112562	112569	112568	112573	112660
8	112665	112663	112663	112662	112659	112553	112561	112663	112666	112668	112558	112661	112554	112575	112659
9	112541	112554	112662	112666	112670	112666	112584	112665	112666	112666	112579	112665	112666	112657	112659
10	112669	112667	112666	112666	112550	112553	112581	112665	112664	112671	112563	112667	112576	112658	112659
11	112662	112671	112662	112666	112552	112553	112555	112665	112664	112666	112556	112663	112594	112657	112659
12	112661	112663	112662	112663	112552	112551	112583	112670	112664	112662	112573	112669	112557	112657	112660
13	112665	112664	112662	112666	112550	112553	112573	112674	112664	112665	112572	112663	112565	112659	112663
14	112551	112554	112663	112662	112551	112541	112582	112664	112597	112666	112560	112570	112554	112657	112659
15	112669	112667	112663	112662	112539	112552	112583	112664	112701	112666	112562	112574	112565	112658	112659
16	112666	112666	112668	112668	112552	112558	112571	112666	112670	112663	112556	112674	112553	112657	112659
17	112661	112663	112663	112666	112555	112554	112554	112670	112666	112666	112572	112573	112569	112657	112659
18	112663	112554	112665	112665	112553	112553	112553	112674	112599	112666	112567	112669	112565	112659	112659
19	112558	112561	112671	112668	112559	112665	112580	112666	112665	112666	112573	112668	112549	112657	112659
20	112668	112667	112671	112668	112549	112555	112667	112664	112666	112665	112562	112668	112563	112657	112658
21	112667	112666	112668	112669	112550	112557	112576	112674	112666	112666	112571	112669	112561	112657	112659
22	112557	112552	112662	112671	112550	112666	112584	112674	112666	112666	112559	112661	112564	112657	112660
23	112661	112565	112666	112662	112551	112664	112576	112664	112664	112662	112550	112661	112563	112657	112660
25	112665	112553	112666	112666	112550	112554	112580	112664	112664	112666	112573	112662	112565	112657	112661
30	112662	112671	112666	112663	112536	112553	112553	112666	112666	112663	112571	112535	112565	112657	112658
40	112666	112667	112663	112666	112540	112666	112581	112663	112664	112666	112556	112552	112551	112658	112659

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	112581 bytes	–	100%
1,000	112555 bytes	-26 bytes	100%
10,000	112545 bytes	-10 bytes	100%
100,000	112537 bytes	-8 bytes	1.74%
1,000,000	112535 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)	112738 bytes	+203 bytes (+0.18%)	+124 bytes
1	112677 bytes	+142 bytes (+0.13%)	+63 bytes
2	112721 bytes	+186 bytes (+0.17%)	+107 bytes
3	112756 bytes	+221 bytes (+0.20%)	+142 bytes
4	112654 bytes	+119 bytes (+0.11%)	+40 bytes
5	112614 bytes	+79 bytes (+0.07%)	–
6	112656 bytes	+121 bytes (+0.11%)	+42 bytes
7	112695 bytes	+160 bytes (+0.14%)	+81 bytes
8	112746 bytes	+211 bytes (+0.19%)	+132 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	76743 bytes	-35792 bytes (-31.81%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	82258 bytes	-30277 bytes (-26.90%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	88565 bytes	-23970 bytes (-21.30%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	93472 bytes	-19063 bytes (-16.94%)
Brotli (Wikipedia)	brotli	brotli -q 11	97708 bytes	-14827 bytes (-13.18%)
LZMA2 (Wikipedia)	xz	xz -9	99976 bytes	-12559 bytes (-11.16%)
Zstandard (Wikipedia)	zstd	zstd -19	102761 bytes	-9774 bytes (-8.69%)

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.