Vue 2.5.15 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 288591 bytes (281.8k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 86328 bytes (84.3k, 30%).

After GZIP compression these minified files vary in size:

Boot	36267 bytes (35.4k)	CDN
gzip -6 (default)	31606 bytes (30.9k)	local copy
gzip -9	31551 bytes (30.8k)	local copy
cdnjs	31514 bytes (30.8k)	CDN
unpkg	31514 bytes (30.8k)	CDN
libdeflate -12	30500 bytes (29.8k)	local copy
7zip -mx=9 -tgzip	30478 bytes (29.8k)	local copy
kzip -s0 -rn -b1	30476 bytes (29.8k)	local copy
zultra	30421 bytes (29.7k)	local copy
pigz -11 -n	30407 bytes (29.7k)	local copy
Zopfli	30371 bytes (29.7k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/vue/vue-2.5.15.min.js (or via HTTPS)

You will automatically get the smallest Vue 2.5.15 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 1143 bytes by using my Vue 2.5.15 Zopfli version instead of the best available CDN (3.76% smaller than unpkg, 30371 vs. 31514 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 --mls32768 --bsr22 --lazy --ohh

(found March 13, 2018)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	32768	--mls32768
block splitting recursion	22	--bsr22
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

Verify file integrity

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

MD5:
curl --silent --compressed https://raw.githubusercontent.com/vuejs/vue/vue-2.5.15.min.js --location | md5sum
e2abec980277391179633867ef3cd3ab -
curl --silent --compressed https://minime.stephan-brumme.com/files/vue/vue-2.5.15.min.zopfli.js.gz | md5sum
e2abec980277391179633867ef3cd3ab -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/vuejs/vue/vue-2.5.15.min.js --location | sha1sum
46868a4853ea4670e7548d327d8764135af150e7 -
curl --silent --compressed https://minime.stephan-brumme.com/files/vue/vue-2.5.15.min.zopfli.js.gz | sha1sum
46868a4853ea4670e7548d327d8764135af150e7 -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	36267 bytes	e2abec980277391179633867ef3cd3ab	March 13, 2018 @ 18:54
cdnjs	31514 bytes	e2abec980277391179633867ef3cd3ab	(invalid)
unpkg	31514 bytes	e2abec980277391179633867ef3cd3ab	(invalid)

Note: only the MD5 hashes are shown to keep things simple.

Other Versions

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

2.6.14, 2.6.13, 2.6.12, 2.6.11, 2.6.10, 2.6.9, 2.6.8, 2.6.7, 2.6.6, 2.6.5, 2.6.4, 2.6.3, 2.6.2, 2.6.1, 2.6.0, 2.5.22, 2.5.21, 2.5.20, 2.5.19, 2.5.18, 2.5.17, 2.5.16, 2.5.15, 2.5.14, 2.5.13, 2.5.12, 2.5.11, 2.5.10, 2.5.9, 2.5.8, 2.5.7, 2.5.6, 2.5.5, 2.5.4, 2.5.3, 2.5.2, 2.5.1, 2.5.0, 2.4.4, 2.4.3, 2.4.2, 2.4.1, 2.4.0, 2.3.4, 2.3.3, 2.3.2, 2.3.1, 2.3.0, 2.2.6, 2.2.5, 2.2.4, 2.2.3, 2.2.2, 2.2.1, 2.2.0, 2.1.10, 2.1.9, 2.1.8, 2.1.7, 2.1.6, 2.1.5, 2.1.4, 2.1.3, 2.1.2, 2.1.1, 2.1.0, 2.0.8, 2.0.7, 2.0.6, 2.0.5, 2.0.4, 2.0.3, 2.0.2, 2.0.1, 2.0.0,
1.0.28, 1.0.27, 1.0.26, 1.0.25, 1.0.24, 1.0.23, 1.0.22, 1.0.21, 1.0.20, 1.0.19, 1.0.18, 1.0.17, 1.0.16, 1.0.15, 1.0.14, 1.0.13, 1.0.12, 1.0.11, 1.0.10, 1.0.9,
0.10.6, 0.10.5, 0.10.4, 0.10.3, 0.10.2, 0.10.1, 0.10.0,
0.9.3, 0.9.2, 0.9.1, 0.9.0

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

Changelog

Best Zopfli parameters so far:

Size	Improvement	Parameters	Found
30371 bytes	-1 byte	zopfli --i1000000 --mls32768 --bsr22 --lazy --ohh	March 13, 2018 @ 04:42
30372 bytes	-2 bytes	zopfli --i1000000 --mls512 --bsr22 --lazy --ohh	March 13, 2018 @ 01:04
30374 bytes	-1 byte	zopfli --i100000 --mls512 --bsr22 --lazy --ohh	March 12, 2018 @ 17:20
30375 bytes	-2 bytes	zopfli --i10000 --mls512 --bsr22 --lazy --ohh	March 12, 2018 @ 16:51
30377 bytes	-3 bytes	zopfli --i1000 --mls512 --bsr22 --lazy --ohh	March 12, 2018 @ 16:36
30380 bytes	-2 bytes	zopfli --i1000 --mls512 --bsr25 --lazy --ohh	March 12, 2018 @ 16:35
30382 bytes	–	zopfli --i100 --mls512 --bsr25 --lazy --ohh	March 12, 2018 @ 16:24

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 @ 12:55.

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	30414	30414	30414	30401	30411	30395	30392	30399	30400	30393	30403	30396	30391	30400	30400
4	30378	30378	30403	30398	30398	30396	30396	30394	30395	30399	30398	30396	30400	30408	30401
6	30403	30395	30393	30403	30403	30396	30397	30400	30379	30394	30400	30396	30395	30400	30398
7	30389	30397	30396	30403	30390	30398	30386	30395	30399	30394	30393	30393	30396	30403	30397
8	30413	30393	30398	30403	30397	30393	30397	30398	30398	30393	30399	30399	30396	30407	30403
9	30402	30400	30403	30402	30403	30391	30386	30395	30376	30396	30394	30395	30393	30405	30412
10	30405	30394	30402	30403	30403	30393	30397	30400	30379	30396	30395	30395	30396	30403	30401
11	30402	30397	30391	30404	30389	30394	30397	30383	30399	30394	30395	30395	30393	30405	30397
12	30391	30397	30402	30402	30403	30395	30397	30397	30396	30394	30393	30396	30395	30408	30398
13	30394	30397	30402	30403	30392	30397	30397	30395	30398	30394	30395	30398	30388	30405	30400
14	30394	30397	30402	30396	30381	30395	30397	30395	30399	30394	30392	30395	30396	30406	30398
15	30402	30395	30383	30404	30381	30394	30397	30395	30397	30396	30395	30395	30397	30400	30397
16	30398	30399	30400	30403	30403	30394	30397	30394	30394	30394	30393	30396	30399	30403	30401
17	30396	30399	30402	30404	30393	30396	30397	30394	30378	30394	30393	30395	30400	30403	30401
18	30391	30397	30402	30403	30393	30394	30397	30398	30377	30393	30394	30396	30388	30399	30399
19	30390	30398	30384	30403	30389	30397	30397	30395	30395	30394	30393	30396	30388	30406	30398
20	30394	30398	30402	30403	30392	30399	30397	30396	30384	30394	30395	30397	30395	30407	30398
21	30388	30399	30413	30403	30401	30395	30397	30396	30379	30393	30392	30396	30395	30405	30395
22	30391	30398	30390	30404	30393	30394	30397	30386	30372	30394	30395	30396	30396	30407	30371
23	30402	30399	30383	30403	30388	30393	30398	30388	30376	30395	30394	30394	30396	30406	30396
25	30391	30398	30403	30403	30406	30395	30396	30398	30378	30396	30395	30396	30398	30408	30398
30	30402	30397	30403	30402	30397	30394	30396	30395	30399	30395	30395	30396	30388	30405	30398
40	30402	30395	30402	30402	30392	30395	30383	30395	30397	30393	30392	30395	30395	30399	30398

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	30382 bytes	–	100%
1,000	30377 bytes	-5 bytes	100%
10,000	30375 bytes	-2 bytes	100%
100,000	30374 bytes	-1 byte	1.45%
1,000,000	30371 bytes	-3 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)	30476 bytes	+105 bytes (+0.35%)	–
1	30476 bytes	+105 bytes (+0.35%)	–
2	30486 bytes	+115 bytes (+0.38%)	+10 bytes
3	30488 bytes	+117 bytes (+0.39%)	+12 bytes
4	30507 bytes	+136 bytes (+0.45%)	+31 bytes
5	30534 bytes	+163 bytes (+0.54%)	+58 bytes
6	30538 bytes	+167 bytes (+0.55%)	+62 bytes
7	30498 bytes	+127 bytes (+0.42%)	+22 bytes
8	30524 bytes	+153 bytes (+0.50%)	+48 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	25238 bytes	-5133 bytes (-16.90%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	26011 bytes	-4360 bytes (-14.36%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	26852 bytes	-3519 bytes (-11.59%)
Brotli (Wikipedia)	brotli	brotli -q 11	28583 bytes	-1788 bytes (-5.89%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	29095 bytes	-1276 bytes (-4.20%)
LZMA2 (Wikipedia)	xz	xz -9	29368 bytes	-1003 bytes (-3.30%)
Zstandard (Wikipedia)	zstd	zstd -19	30020 bytes	-351 bytes (-1.16%)

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.