Ember 2.17.2 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1605952 bytes (1,568.3k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 488131 bytes (476.7k, 30%).

After GZIP compression these minified files vary in size:

Boot	129854 bytes (126.8k)	CDN
cdnjs	124033 bytes (121.1k)	CDN
gzip -6 (default)	122517 bytes (119.6k)	local copy
gzip -9	121996 bytes (119.1k)	local copy
7zip -mx=9 -tgzip	117851 bytes (115.1k)	local copy
libdeflate -12	117778 bytes (115.0k)	local copy
zultra	117762 bytes (115.0k)	local copy
pigz -11 -n	117696 bytes (114.9k)	local copy
kzip -s0 -rn -b3	117572 bytes (114.8k)	local copy
Zopfli	117549 bytes (114.8k)	local copy
Zopfli (defluff)	117544 bytes (114.8k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-2.17.2.min.js (or via HTTPS)

You will automatically get the smallest Ember 2.17.2 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 6484 bytes by using my Ember 2.17.2 Zopfli version instead of the best available CDN (5.52% smaller than cdnjs, 117549 vs. 124033 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 --mls2 --bsr12 --lazy --ohh

(found February 21, 2018)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	2	--mls2
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 5 more bytes (117544 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/v2.17.2/ember.min.js --location | md5sum
74e5e18393d4a788552b2882467d53bd -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.17.2.min.zopfli.js.gz | md5sum
74e5e18393d4a788552b2882467d53bd -

SHA1:
curl --silent --compressed https://builds.emberjs.com/tags/v2.17.2/ember.min.js --location | sha1sum
b9360ea7d8ee1e279131d6c6a5c513f70c362556 -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.17.2.min.zopfli.js.gz | sha1sum
b9360ea7d8ee1e279131d6c6a5c513f70c362556 -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	129854 bytes	74e5e18393d4a788552b2882467d53bd	June 7, 2018 @ 20:21
cdnjs	124033 bytes	74e5e18393d4a788552b2882467d53bd	February 15, 2018 @ 01:49

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
117549 bytes	-2 bytes	zopfli --i1000000 --mls2 --bsr12 --lazy --ohh	February 21, 2018 @ 06:32
117551 bytes	-3 bytes	zopfli --i100000 --mls2 --bsr12 --lazy --ohh	February 17, 2018 @ 10:35
117554 bytes	-1 byte	zopfli --i10000 --mls8 --bsr11 --lazy --ohh	February 17, 2018 @ 08:06
117555 bytes	-1 byte	zopfli --i100000 --mls2048 --bsr25 --lazy --ohh	February 17, 2018 @ 02:35
117556 bytes	-7 bytes	zopfli --i10000 --mls2 --bsr17 --lazy --ohh	February 16, 2018 @ 17:54
117563 bytes	-3 bytes	zopfli --i1000 --mls2 --bsr17 --lazy --ohh	February 16, 2018 @ 17:02
117566 bytes	-2 bytes	zopfli --i1000 --mls4096 --bsr30 --lazy --ohh	February 16, 2018 @ 16:44
117568 bytes	-16 bytes	zopfli --i1000 --mls8 --bsr21 --lazy --ohh	February 16, 2018 @ 16:36
117584 bytes	–	zopfli --i100 --mls2 --bsr17 --lazy --ohh	February 15, 2018 @ 16:34

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 @ 12:50.

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	117585	117585	117580	117582	117575	117581	117604	117581	117583	117575	117570	117584	117571	117578	117631
4	117575	117577	117557	117574	117558	117578	117576	117580	117584	117581	117564	117569	117598	117576	117627
6	117572	117591	117578	117559	117559	117558	117572	117575	117570	117571	117560	117559	117566	117577	117620
7	117569	117571	117570	117558	117559	117558	117569	117570	117581	117573	117560	117566	117571	117585	117589
8	117570	117569	117575	117557	117563	117562	117568	117585	117578	117579	117557	117561	117596	117582	117618
9	117576	117571	117570	117558	117558	117562	117573	117578	117585	117574	117558	117559	117583	117633	117629
10	117572	117575	117578	117571	117558	117561	117575	117587	117559	117556	117565	117574	117588	117590	117624
11	117576	117575	117553	117558	117562	117558	117572	117574	117569	117561	117571	117560	117583	117588	117575
12	117549	117557	117556	117558	117556	117561	117575	117574	117570	117572	117558	117559	117614	117586	117621
13	117561	117557	117571	117559	117556	117557	117567	117574	117572	117569	117582	117571	117614	117587	117623
14	117589	117588	117577	117566	117563	117562	117567	117576	117569	117558	117570	117574	117594	117583	117583
15	117558	117556	117558	117559	117559	117559	117560	117572	117558	117561	117563	117566	117627	117587	117618
16	117574	117557	117557	117558	117557	117560	117559	117571	117560	117557	117570	117572	117594	117586	117595
17	117556	117557	117558	117561	117570	117557	117569	117574	117561	117560	117557	117562	117594	117580	117582
18	117574	117574	117573	117558	117556	117567	117573	117573	117569	117571	117557	117565	117593	117582	117621
19	117574	117574	117573	117561	117559	117558	117560	117577	117559	117561	117570	117558	117593	117587	117618
20	117573	117577	117574	117558	117558	117557	117572	117574	117568	117572	117570	117557	117594	117587	117621
21	117574	117559	117558	117559	117558	117559	117561	117561	117561	117561	117556	117559	117583	117582	117633
22	117584	117573	117572	117558	117557	117559	117570	117572	117557	117557	117557	117559	117594	117587	117619
23	117576	117574	117570	117559	117558	117563	117575	117574	117572	117569	117556	117559	117588	117579	117627
25	117561	117559	117558	117559	117558	117558	117558	117562	117560	117561	117555	117562	117593	117587	117623
30	117556	117560	117557	117557	117557	117557	117573	117572	117559	117572	117560	117559	117594	117572	117620
40	117575	117574	117557	117559	117559	117559	117558	117561	117558	117560	117559	117557	117595	117587	117621

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	117584 bytes	–	100%
1,000	117562 bytes	-22 bytes	100%
10,000	117554 bytes	-8 bytes	100%
100,000	117551 bytes	-3 bytes	1.16%
1,000,000	117549 bytes	-2 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)	117635 bytes	+86 bytes (+0.07%)	+63 bytes
1	117671 bytes	+122 bytes (+0.10%)	+99 bytes
2	117617 bytes	+68 bytes (+0.06%)	+45 bytes
3	117572 bytes	+23 bytes (+0.02%)	–
4	117625 bytes	+76 bytes (+0.06%)	+53 bytes
5	117646 bytes	+97 bytes (+0.08%)	+74 bytes
6	117640 bytes	+91 bytes (+0.08%)	+68 bytes
7	117579 bytes	+30 bytes (+0.03%)	+7 bytes
8	117633 bytes	+84 bytes (+0.07%)	+61 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	81104 bytes	-36445 bytes (-31.00%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	87916 bytes	-29633 bytes (-25.21%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	94464 bytes	-23085 bytes (-19.64%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	100726 bytes	-16823 bytes (-14.31%)
Brotli (Wikipedia)	brotli	brotli -q 11	102592 bytes	-14957 bytes (-12.72%)
LZMA2 (Wikipedia)	xz	xz -9	104164 bytes	-13385 bytes (-11.39%)
Zstandard (Wikipedia)	zstd	zstd -19	107158 bytes	-10391 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.