Dojo 1.11.13 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 633795 bytes (618.9k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 166077 bytes (162.2k, 26%).

After GZIP compression these minified files vary in size:

gzip -6 (default)	56041 bytes (54.7k)	local copy
gzip -9	55984 bytes (54.7k)	local copy
libdeflate -12	53340 bytes (52.1k)	local copy
7zip -mx=9 -tgzip	53315 bytes (52.1k)	local copy
zultra	53243 bytes (52.0k)	local copy
kzip -s0 -rn -b1	53241 bytes (52.0k)	local copy
pigz -11 -n	53241 bytes (52.0k)	local copy
Zopfli	53146 bytes (51.9k)	local copy
Zopfli (defluff)	53144 bytes (51.9k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/dojo/dojo-1.11.13.min.js (or via HTTPS)

You will automatically get the smallest Dojo 1.11.13 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 8, 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 (53144 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-1.11.13/dojo.js --location | md5sum
bd1f1c598d4c448582071569f7c8700a -
curl --silent --compressed https://minime.stephan-brumme.com/files/dojo/dojo-1.11.13.min.zopfli.js.gz | md5sum
bd1f1c598d4c448582071569f7c8700a -

SHA1:
curl --silent --compressed https://download.dojotoolkit.org/release-1.11.13/dojo.js --location | sha1sum
a6250ffd333254a3ab5cbcf8f0966a6e6fc66ada -
curl --silent --compressed https://minime.stephan-brumme.com/files/dojo/dojo-1.11.13.min.zopfli.js.gz | sha1sum
a6250ffd333254a3ab5cbcf8f0966a6e6fc66ada -

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
53146 bytes	-1 byte	zopfli --i1000000 --mls128 --bsr11 --lazy --ohh	March 8, 2022 @ 04:34
53147 bytes	-1 byte	zopfli --i1000000 --mls128 --bsr15 --lazy --ohh	March 7, 2022 @ 19:41
53148 bytes	-3 bytes	zopfli --i100000 --mls128 --bsr15 --lazy --ohh	March 5, 2022 @ 08:07
53151 bytes	-3 bytes	zopfli --i100000 --mls8 --bsr10 --lazy --ohh	March 5, 2022 @ 01:10
53154 bytes	-1 byte	zopfli --i10000 --mls8 --bsr10 --lazy --ohh	February 28, 2022 @ 17:20
53155 bytes	-1 byte	zopfli --i10000 --mls2 --bsr14 --lazy --ohh	February 27, 2022 @ 04:15
53156 bytes	-2 bytes	zopfli --i10000 --mls128 --bsr17 --lazy --ohh	February 26, 2022 @ 08:12
53158 bytes	-1 byte	zopfli --i10000 --mls64 --bsr2 --lazy --ohh	February 25, 2022 @ 21:06
53159 bytes	-1 byte	zopfli --i10000 --mls16 --bsr30 --lazy --ohh	February 25, 2022 @ 06:04
53160 bytes	-1 byte	zopfli --i1000 --mls32 --bsr25 --lazy --ohh	February 24, 2022 @ 20:54
53161 bytes	-1 byte	zopfli --i1000 --mls8 --bsr23 --lazy --ohh	February 24, 2022 @ 18:19
53162 bytes	-1 byte	zopfli --i1000 --mls16 --bsr21 --lazy --ohh	February 24, 2022 @ 17:28
53163 bytes	–	zopfli --i100 --mls16 --bsr30 --lazy --ohh	February 24, 2022 @ 15:24

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

Most recent activity on March 8, 2022 @ 13:21.

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	53158	53160	53157	53158	53158	53158	53157	53161	53158	53180	53172	53161	53169	53183	53180
4	53187	53155	53158	53158	53173	53164	53160	53158	53164	53161	53166	53158	53168	53159	53180
6	53199	53187	53158	53157	53167	53158	53167	53158	53168	53168	53169	53164	53168	53169	53168
7	53190	53193	53161	53193	53157	53161	53164	53162	53162	53160	53172	53163	53164	53177	53169
8	53188	53187	53157	53157	53160	53171	53157	53156	53171	53169	53170	53168	53175	53170	53173
9	53192	53196	53158	53163	53157	53162	53157	53156	53165	53168	53168	53166	53167	53173	53185
10	53155	53186	53151	53188	53170	53157	53155	53157	53169	53168	53171	53167	53174	53172	53177
11	53190	53190	53156	53158	53161	53160	53146	53149	53159	53168	53169	53164	53169	53162	53173
12	53188	53189	53159	53188	53161	53162	53156	53155	53169	53166	53168	53169	53166	53168	53168
13	53186	53185	53156	53159	53161	53163	53155	53159	53169	53168	53169	53166	53171	53161	53168
14	53155	53189	53156	53160	53168	53161	53147	53159	53171	53170	53170	53166	53170	53167	53168
15	53186	53192	53164	53158	53159	53159	53147	53165	53171	53168	53169	53165	53169	53177	53169
16	53189	53184	53156	53192	53157	53169	53157	53167	53164	53168	53169	53168	53166	53178	53168
17	53186	53186	53164	53159	53157	53160	53156	53165	53169	53166	53171	53168	53168	53166	53174
18	53189	53196	53159	53158	53157	53160	53155	53164	53169	53169	53166	53166	53166	53174	53169
19	53186	53187	53159	53158	53164	53160	53155	53159	53171	53166	53169	53161	53170	53167	53180
20	53187	53196	53159	53158	53162	53162	53156	53164	53170	53168	53169	53165	53170	53167	53176
21	53186	53183	53158	53158	53160	53158	53157	53157	53166	53169	53169	53166	53173	53173	53169
22	53188	53183	53159	53156	53161	53157	53155	53165	53165	53169	53171	53166	53165	53161	53168
23	53191	53185	53157	53158	53157	53160	53155	53164	53169	53168	53173	53167	53165	53176	53168
25	53184	53197	53157	53158	53156	53155	53163	53166	53170	53168	53169	53168	53166	53174	53171
30	53185	53183	53159	53159	53162	53156	53156	53165	53170	53168	53169	53168	53169	53165	53170
40	53190	53179	53155	53159	53161	53156	53156	53164	53165	53167	53168	53164	53171	53178	53169

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	53163 bytes	–	100%
1,000	53160 bytes	-3 bytes	100%
10,000	53154 bytes	-6 bytes	100%
100,000	53148 bytes	-6 bytes	2.03%
1,000,000	53146 bytes	-2 bytes	0.87%
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)	53272 bytes	+126 bytes (+0.24%)	+31 bytes
1	53241 bytes	+95 bytes (+0.18%)	–
2	53271 bytes	+125 bytes (+0.24%)	+30 bytes
3	53295 bytes	+149 bytes (+0.28%)	+54 bytes
4	53324 bytes	+178 bytes (+0.33%)	+83 bytes
5	53339 bytes	+193 bytes (+0.36%)	+98 bytes
6	53388 bytes	+242 bytes (+0.46%)	+147 bytes
7	53400 bytes	+254 bytes (+0.48%)	+159 bytes
8	53396 bytes	+250 bytes (+0.47%)	+155 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	39062 bytes	-14084 bytes (-26.50%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	46626 bytes	-6520 bytes (-12.27%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	47537 bytes	-5609 bytes (-10.55%)
Brotli (Wikipedia)	brotli	brotli -q 11	49152 bytes	-3994 bytes (-7.52%)
LZMA2 (Wikipedia)	xz	xz -9	50144 bytes	-3002 bytes (-5.65%)
Zstandard (Wikipedia)	zstd	zstd -19	51445 bytes	-1701 bytes (-3.20%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	51603 bytes	-1543 bytes (-2.90%)

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.