Ember 1.11.4 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1444850 bytes (1,411.0k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 409238 bytes (399.6k, 28%).

After GZIP compression these minified files vary in size:

Boot	131527 bytes (128.4k)	CDN
gzip -6 (default)	106644 bytes (104.1k)	local copy
gzip -9	106325 bytes (103.8k)	local copy
cdnjs	106104 bytes (103.6k)	CDN
7zip -mx=9 -tgzip	102776 bytes (100.4k)	local copy
libdeflate -12	102548 bytes (100.1k)	local copy
pigz -11 -n	102536 bytes (100.1k)	local copy
zultra	102500 bytes (100.1k)	local copy
kzip -s0 -rn -b1	102371 bytes (100.0k)	local copy
Zopfli	102330 bytes (99.9k)	local copy
Zopfli (defluff)	102329 bytes (99.9k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-1.11.4.min.js (or via HTTPS)

You will automatically get the smallest Ember 1.11.4 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 3774 bytes by using my Ember 1.11.4 Zopfli version instead of the best available CDN (3.69% smaller than cdnjs, 102330 vs. 106104 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 --i100000 --mb8 --mls8 --bsr18 --lazy --ohh

(found March 28, 2017)

Description	Value	Parameter
iterations	100000	--i100000
maximum blocks	8	--mb8
maximum length score	8	--mls8
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 1 more byte (102329 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/v1.11.4/ember.min.js --location | md5sum
dbbed4ba58d609c1dd4ee2ba57db36af -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-1.11.4.min.zopfli.js.gz | md5sum
dbbed4ba58d609c1dd4ee2ba57db36af -

SHA1:
curl --silent --compressed https://builds.emberjs.com/tags/v1.11.4/ember.min.js --location | sha1sum
45cee5bd0e387e7a0daca8496d5d0cd04388ad2f -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-1.11.4.min.zopfli.js.gz | sha1sum
45cee5bd0e387e7a0daca8496d5d0cd04388ad2f -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	131527 bytes	dbbed4ba58d609c1dd4ee2ba57db36af	January 16, 2016 @ 14:39
cdnjs	106104 bytes	dbbed4ba58d609c1dd4ee2ba57db36af	January 15, 2016 @ 13:32

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
102330 bytes	-1 byte	zopfli --i100000 --mls8 --bsr18 --lazy --ohh	March 28, 2017 @ 17:02
102331 bytes	-1 byte	zopfli --i100000 --mls16 --bsr17 --lazy --ohh	March 27, 2017 @ 11:07
102332 bytes	-1 byte	zopfli --i100000 --mls16 --bsr19 --lazy --ohh	January 26, 2016 @ 21:51
102333 bytes	-1 byte	zopfli --i100000 --mls256 --bsr16 --lazy --ohh	January 26, 2016 @ 20:23
102334 bytes	-1 byte	zopfli --i100000 --mls256 --bsr9 --lazy --ohh	January 26, 2016 @ 16:51
102335 bytes	-3 bytes	zopfli --i10000 --mls256 --bsr9 --lazy --ohh	January 25, 2016 @ 22:31
102338 bytes	-1 byte	zopfli --i10000 --mls1024 --bsr20 --lazy --ohh	January 25, 2016 @ 18:42
102339 bytes	-5 bytes	zopfli --i10000 --mls64 --bsr13 --lazy --ohh	January 25, 2016 @ 13:45
102344 bytes	-12 bytes	zopfli --i10000 --mls32768 --bsr16 --lazy --ohh	January 25, 2016 @ 10:24
102356 bytes	-12 bytes	zopfli --i1000 --mls32768 --bsr16 --lazy --ohh	January 25, 2016 @ 09:48
102368 bytes	–	zopfli --i100 --mls32768 --bsr16 --lazy --ohh	January 25, 2016 @ 09:37

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 @ 12:48.

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 or 100,000.

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	102336	102339	102340	102369	102378	102373	102345	102402	102402	102371	102375	102370	102374	102409	102373
4	102342	102342	102342	102342	102357	102339	102340	102338	102338	102338	102339	102336	102343	102349	102343
6	102372	102367	102343	102372	102371	102372	102402	102402	102402	102374	102369	102367	102369	102409	102381
7	102336	102340	102352	102336	102336	102337	102339	102336	102339	102339	102369	102368	102342	102348	102343
8	102340	102340	102338	102338	102338	102341	102340	102334	102339	102337	102339	102338	102345	102348	102343
9	102338	102340	102341	102339	102338	102333	102338	102334	102339	102340	102339	102336	102343	102342	102345
10	102348	102349	102348	102342	102338	102337	102339	102338	102338	102338	102338	102338	102336	102349	102343
11	102341	102340	102343	102338	102339	102337	102336	102338	102338	102338	102339	102338	102342	102355	102343
12	102341	102341	102338	102338	102339	102337	102339	102334	102338	102338	102339	102338	102344	102349	102344
13	102352	102340	102337	102337	102344	102339	102339	102336	102339	102338	102338	102337	102378	102351	102343
14	102340	102340	102347	102338	102338	102337	102337	102336	102338	102345	102338	102336	102342	102349	102343
15	102336	102344	102352	102332	102338	102337	102337	102339	102338	102340	102338	102338	102346	102348	102343
16	102339	102338	102340	102341	102340	102340	102337	102333	102338	102338	102340	102338	102342	102348	102344
17	102347	102352	102353	102331	102340	102339	102337	102340	102338	102345	102339	102343	102337	102348	102345
18	102337	102343	102330	102338	102338	102333	102337	102340	102339	102337	102333	102338	102378	102348	102344
19	102341	102340	102337	102332	102338	102337	102339	102334	102339	102338	102338	102338	102343	102348	102344
20	102340	102340	102338	102338	102338	102337	102339	102336	102338	102338	102338	102338	102342	102349	102344
21	102337	102338	102337	102339	102338	102337	102339	102336	102338	102338	102338	102338	102344	102348	102343
22	102340	102340	102340	102338	102338	102333	102337	102336	102340	102338	102338	102337	102343	102354	102343
23	102338	102338	102337	102337	102338	102336	102339	102337	102338	102338	102338	102333	102337	102348	102345
25	102338	102338	102337	102338	102338	102336	102339	102336	102338	102338	102339	102337	102342	102348	102344
30	102338	102341	102343	102338	102338	102337	102339	102337	102340	102339	102338	102337	102336	102346	102343
40	102352	102352	102353	102339	102338	102333	102333	102340	102338	102340	102337	102336	102342	102349	102343

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	102368 bytes	–	100%
1,000	102348 bytes	-20 bytes	100%
10,000	102335 bytes	-13 bytes	100%
100,000	102330 bytes	-5 bytes	5.51%
1,000,000	–	–	–
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)	102385 bytes	+55 bytes (+0.05%)	+14 bytes
1	102371 bytes	+41 bytes (+0.04%)	–
2	102435 bytes	+105 bytes (+0.10%)	+64 bytes
3	102458 bytes	+128 bytes (+0.13%)	+87 bytes
4	102515 bytes	+185 bytes (+0.18%)	+144 bytes
5	102524 bytes	+194 bytes (+0.19%)	+153 bytes
6	102533 bytes	+203 bytes (+0.20%)	+162 bytes
7	102510 bytes	+180 bytes (+0.18%)	+139 bytes
8	102503 bytes	+173 bytes (+0.17%)	+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	70750 bytes	-31580 bytes (-30.86%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	75345 bytes	-26985 bytes (-26.37%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	80057 bytes	-22273 bytes (-21.77%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	85691 bytes	-16639 bytes (-16.26%)
Brotli (Wikipedia)	brotli	brotli -q 11	89676 bytes	-12654 bytes (-12.37%)
LZMA2 (Wikipedia)	xz	xz -9	91572 bytes	-10758 bytes (-10.51%)
Zstandard (Wikipedia)	zstd	zstd -19	94131 bytes	-8199 bytes (-8.01%)

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.