Dojo 1.11.10 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 633465 bytes (618.6k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 165884 bytes (162.0k, 26%).

After GZIP compression these minified files vary in size:

gzip -6 (default)	55950 bytes (54.6k)	local copy
gzip -9	55902 bytes (54.6k)	local copy
libdeflate -12	53256 bytes (52.0k)	local copy
7zip -mx=9 -tgzip	53232 bytes (52.0k)	local copy
pigz -11 -n	53163 bytes (51.9k)	local copy
zultra	53159 bytes (51.9k)	local copy
kzip -s0 -rn -b1	53158 bytes (51.9k)	local copy
Zopfli	53065 bytes (51.8k)	local copy
Zopfli (defluff)	53063 bytes (51.8k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/dojo/dojo-1.11.10.min.js (or via HTTPS)

You will automatically get the smallest Dojo 1.11.10 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

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 --mls128 --bsr11 --lazy --ohh

(found March 14, 2022)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	128	--mls128
block splitting recursion	11	--bsr11
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 2 more bytes (53063 bytes).

Download

Verify file integrity

After decompression, my uncompressed files are identical to the original ones:

MD5:
curl --silent --compressed https://download.dojotoolkit.org/release-1.11.10/dojo.js --location | md5sum
734c7b2ba14e0c2ea6bd3044356b28a8 -
curl --silent --compressed https://minime.stephan-brumme.com/files/dojo/dojo-1.11.10.min.zopfli.js.gz | md5sum
734c7b2ba14e0c2ea6bd3044356b28a8 -

SHA1:
curl --silent --compressed https://download.dojotoolkit.org/release-1.11.10/dojo.js --location | sha1sum
7b6ed888c270cdf77ab2b84303f128ebbd64a233 -
curl --silent --compressed https://minime.stephan-brumme.com/files/dojo/dojo-1.11.10.min.zopfli.js.gz | sha1sum
7b6ed888c270cdf77ab2b84303f128ebbd64a233 -

Other Versions

Available Dojo versions at minime.stephan-brumme.com:

1.17.3, 1.17.2, 1.17.1, 1.17.0,
1.16.5, 1.16.4, 1.16.3, 1.16.2, 1.16.1, 1.16.0,
1.15.6, 1.15.5, 1.15.4, 1.15.3, 1.15.2, 1.15.1, 1.15.0,
1.14.9, 1.14.8, 1.14.7, 1.14.6, 1.14.5, 1.14.4, 1.14.3, 1.14.2, 1.14.1, 1.14.0,
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,
1.12.11, 1.12.10, 1.12.9, 1.12.8, 1.12.7, 1.12.6, 1.12.5, 1.12.4, 1.12.3, 1.12.2, 1.12.1,
1.11.13, 1.11.12, 1.11.11, 1.11.10, 1.11.9, 1.11.8, 1.11.7, 1.11.6, 1.11.5, 1.11.4, 1.11.3, 1.11.2, 1.11.1, 1.11.0,
1.10.10, 1.10.9, 1.10.8, 1.10.7, 1.10.6, 1.10.5, 1.10.4, 1.10.3, 1.10.2, 1.10.1, 1.10.0,
1.9.11, 1.9.10, 1.9.9, 1.9.8, 1.9.7, 1.9.6, 1.9.5, 1.9.4, 1.9.3, 1.9.2, 1.9.1, 1.9.0,
1.8.14, 1.8.13, 1.8.12, 1.8.11, 1.8.10, 1.8.9, 1.8.8, 1.8.7, 1.8.6, 1.8.5, 1.8.4, 1.8.3, 1.8.2, 1.8.1, 1.8.0,
1.7.12, 1.7.11, 1.7.10, 1.7.9, 1.7.8, 1.7.7, 1.7.6, 1.7.5, 1.7.4, 1.7.3, 1.7.2, 1.7.1, 1.7.0,
1.6.5, 1.6.4, 1.6.3, 1.6.2, 1.6.1, 1.6.0,
1.5.6, 1.5.5, 1.5.4, 1.5.3, 1.5.2, 1.5.1, 1.5.0,
1.4.8, 1.4.7, 1.4.6, 1.4.5, 1.4.4, 1.4.3, 1.4.2, 1.4.1, 1.4.0,
1.3.3, 1.3.2, 1.3.1, 1.3.0,
1.2.3, 1.2.2

The project site contains an overview how well these versions were compressed.
Other interesting projects are AngularJS, BackboneJS, Bootstrap, D3, Ember, jQuery, Knockout, lodash, React, Socket.IO, ThreeJS, UnderscoreJS and Vue.

Changelog

Best Zopfli parameters so far:

Size	Improvement	Parameters	Found
53065 bytes	-2 bytes	zopfli --i1000000 --mls128 --bsr11 --lazy --ohh	March 14, 2022 @ 18:04
53067 bytes	-5 bytes	zopfli --i100000 --mls128 --bsr12 --lazy --ohh	March 4, 2022 @ 11:57
53072 bytes	-1 byte	zopfli --i10000 --mls128 --bsr12 --lazy --ohh	February 27, 2022 @ 18:42
53073 bytes	-1 byte	zopfli --i10000 --mls128 --bsr14 --lazy --ohh	February 26, 2022 @ 15:21
53074 bytes	-2 bytes	zopfli --i10000 --mls4 --bsr15 --lazy --ohh	February 25, 2022 @ 09:52
53076 bytes	-2 bytes	zopfli --i10000 --mls2 --bsr16 --lazy --ohh	February 25, 2022 @ 07:42
53078 bytes	-1 byte	zopfli --i1000 --mls4 --bsr18 --lazy --ohh	February 24, 2022 @ 19:40
53079 bytes	-1 byte	zopfli --i1000 --mls16 --bsr40 --lazy --ohh	February 24, 2022 @ 17:17
53080 bytes	–	zopfli --i100 --mls4 --bsr9 --lazy --ohh	February 24, 2022 @ 15:54

If there are multiple parameter sets yielding the same compressed size, only the first one found is shown.

Most recent activity on March 15, 2022 @ 09:44.

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	53076	53076	53077	53078	53078	53079	53078	53078	53079	53078	53087	53079	53088	53104	53088
4	53094	53075	53076	53076	53088	53081	53078	53076	53081	53086	53081	53086	53086	53091	53085
6	53108	53076	53074	53076	53084	53075	53076	53078	53084	53089	53082	53083	53086	53080	53085
7	53111	53073	53113	53077	53074	53074	53073	53083	53083	53078	53088	53086	53085	53096	53085
8	53073	53070	53073	53077	53087	53074	53073	53076	53084	53091	53087	53077	53088	53088	53090
9	53088	53073	53076	53081	53110	53078	53073	53077	53083	53087	53087	53076	53089	53087	53085
10	53074	53074	53074	53111	53091	53074	53089	53076	53082	53087	53089	53077	53090	53089	53084
11	53110	53073	53073	53077	53080	53078	53065	53074	53084	53086	53087	53087	53085	53093	53084
12	53076	53075	53075	53077	53109	53079	53065	53077	53084	53086	53078	53087	53083	53088	53090
13	53107	53075	53076	53075	53095	53079	53070	53075	53084	53087	53088	53076	53085	53085	53084
14	53074	53075	53070	53077	53080	53078	53073	53078	53083	53087	53088	53086	53085	53089	53083
15	53109	53074	53070	53077	53080	53077	53070	53084	53083	53086	53100	53086	53084	53097	53084
16	53076	53074	53073	53074	53074	53079	53075	53084	53084	53086	53082	53077	53084	53089	53084
17	53074	53073	53078	53075	53075	53077	53073	53082	53084	53099	53086	53076	53087	53088	53092
18	53110	53073	53073	53078	53074	53073	53073	53083	53084	53086	53100	53087	53083	53088	53088
19	53110	53073	53077	53076	53090	53079	53073	53076	53083	53099	53086	53078	53085	53090	53087
20	53111	53074	53075	53077	53088	53074	53074	53082	53083	53087	53082	53085	53086	53095	53085
21	53110	53073	53075	53075	53106	53075	53073	53075	53084	53099	53078	53078	53085	53089	53088
22	53111	53073	53076	53077	53079	53074	53073	53083	53083	53086	53082	53086	53084	53096	53084
23	53110	53075	53074	53076	53078	53079	53075	53084	53082	53087	53088	53079	53084	53094	53083
25	53108	53070	53074	53076	53074	53075	53074	53083	53084	53097	53082	53079	53089	53086	53086
30	53103	53074	53077	53077	53081	53074	53074	53077	53086	53085	53100	53077	53085	53095	53083
40	53106	53070	53069	53074	53076	53074	53074	53083	53083	53085	53088	53086	53088	53089	53092

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	53080 bytes	–	100%
1,000	53078 bytes	-2 bytes	100%
10,000	53072 bytes	-6 bytes	100%
100,000	53067 bytes	-5 bytes	2.90%
1,000,000	53065 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)	53220 bytes	+155 bytes (+0.29%)	+62 bytes
1	53158 bytes	+93 bytes (+0.18%)	–
2	53178 bytes	+113 bytes (+0.21%)	+20 bytes
3	53216 bytes	+151 bytes (+0.28%)	+58 bytes
4	53222 bytes	+157 bytes (+0.30%)	+64 bytes
5	53268 bytes	+203 bytes (+0.38%)	+110 bytes
6	53282 bytes	+217 bytes (+0.41%)	+124 bytes
7	53355 bytes	+290 bytes (+0.55%)	+197 bytes
8	53352 bytes	+287 bytes (+0.54%)	+194 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	38996 bytes	-14069 bytes (-26.51%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	46552 bytes	-6513 bytes (-12.27%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	47430 bytes	-5635 bytes (-10.62%)
Brotli (Wikipedia)	brotli	brotli -q 11	48970 bytes	-4095 bytes (-7.72%)
LZMA2 (Wikipedia)	xz	xz -9	50060 bytes	-3005 bytes (-5.66%)
Zstandard (Wikipedia)	zstd	zstd -19	51389 bytes	-1676 bytes (-3.16%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	51722 bytes	-1343 bytes (-2.53%)

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.