Vue 2.5.21 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 311328 bytes (304.0k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 87656 bytes (85.6k, 28%).

After GZIP compression these minified files vary in size:

Boot	31957 bytes (31.2k)	CDN
cdnjs	31957 bytes (31.2k)	CDN
gzip -6 (default)	31724 bytes (31.0k)	local copy
gzip -9	31661 bytes (30.9k)	local copy
unpkg	31649 bytes (30.9k)	CDN
kzip -s0 -rn -b0	30616 bytes (29.9k)	local copy
7zip -mx=9 -tgzip	30601 bytes (29.9k)	local copy
libdeflate -12	30571 bytes (29.9k)	local copy
zultra	30569 bytes (29.9k)	local copy
pigz -11 -n	30548 bytes (29.8k)	local copy
Zopfli	30506 bytes (29.8k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/vue/vue-2.5.21.min.js (or via HTTPS)

You will automatically get the smallest Vue 2.5.21 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 2.5.21 Zopfli version instead of the best available CDN (3.75% smaller than unpkg, 30506 vs. 31649 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 --mls64 --bsr13 --lazy --ohh

(found December 14, 2018)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	64	--mls64
block splitting recursion	13	--bsr13
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-2.5.21.min.js --location | md5sum
f15aee8488ab57c0e80c77a7d10db3cd -
curl --silent --compressed https://minime.stephan-brumme.com/files/vue/vue-2.5.21.min.zopfli.js.gz | md5sum
f15aee8488ab57c0e80c77a7d10db3cd -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/vuejs/vue/vue-2.5.21.min.js --location | sha1sum
702a6f4e5da96f5a7dc6c075878182611f50afbc -
curl --silent --compressed https://minime.stephan-brumme.com/files/vue/vue-2.5.21.min.zopfli.js.gz | sha1sum
702a6f4e5da96f5a7dc6c075878182611f50afbc -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	31957 bytes	f15aee8488ab57c0e80c77a7d10db3cd	(invalid)
cdnjs	31957 bytes	f15aee8488ab57c0e80c77a7d10db3cd	(invalid)
unpkg	31649 bytes	f15aee8488ab57c0e80c77a7d10db3cd	(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
30506 bytes	-1 byte	zopfli --i1000000 --mls64 --bsr13 --lazy --ohh	December 14, 2018 @ 06:45
30507 bytes	-3 bytes	zopfli --i1000000 --mls32 --bsr15 --lazy --ohh	December 14, 2018 @ 03:16
30510 bytes	-2 bytes	zopfli --i100000 --mls512 --bsr17 --lazy --ohh	December 13, 2018 @ 19:42
30512 bytes	-2 bytes	zopfli --i10000 --mls32 --bsr15 --lazy --ohh	December 13, 2018 @ 18:18
30514 bytes	-10 bytes	zopfli --i1000 --mls64 --bsr14 --lazy --ohh	December 13, 2018 @ 17:38
30524 bytes	–	zopfli --i100 --mls512 --bsr17 --lazy --ohh	December 13, 2018 @ 17:22

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 @ 12:56.

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	30549	30536	30539	30543	30532	30543	30536	30539	30538	30541	30551	30538	30534	30554	30535
4	30542	30544	30545	30545	30545	30545	30541	30541	30542	30541	30541	30539	30538	30550	30536
6	30534	30534	30531	30537	30535	30532	30535	30534	30538	30541	30548	30555	30552	30555	30538
7	30536	30539	30539	30532	30514	30536	30538	30536	30539	30537	30537	30535	30536	30553	30531
8	30535	30531	30530	30538	30535	30536	30539	30536	30536	30538	30548	30533	30533	30553	30539
9	30540	30540	30534	30533	30532	30531	30540	30535	30539	30538	30538	30534	30551	30553	30537
10	30537	30530	30536	30537	30519	30516	30537	30535	30520	30541	30548	30534	30534	30540	30534
11	30536	30535	30532	30534	30533	30530	30537	30534	30537	30537	30538	30533	30534	30547	30536
12	30537	30534	30537	30533	30533	30534	30538	30538	30535	30537	30550	30530	30553	30538	30536
13	30536	30534	30532	30533	30532	30506	30537	30539	30536	30537	30550	30536	30527	30538	30537
14	30535	30531	30531	30531	30534	30513	30537	30536	30518	30539	30538	30537	30531	30551	30537
15	30539	30535	30539	30529	30507	30532	30537	30536	30536	30537	30553	30536	30532	30544	30538
16	30535	30536	30532	30534	30533	30532	30538	30537	30536	30538	30548	30533	30532	30539	30535
17	30537	30536	30532	30532	30533	30531	30537	30537	30507	30538	30548	30554	30531	30538	30530
18	30538	30536	30531	30538	30533	30531	30537	30535	30540	30538	30536	30536	30528	30548	30531
19	30540	30539	30532	30528	30533	30533	30536	30536	30538	30538	30537	30534	30532	30548	30532
20	30538	30533	30531	30533	30535	30532	30533	30539	30535	30537	30539	30534	30528	30537	30533
21	30539	30534	30532	30532	30533	30534	30535	30538	30539	30538	30537	30534	30532	30539	30533
22	30535	30536	30531	30528	30534	30531	30538	30538	30537	30538	30538	30553	30532	30548	30531
23	30537	30539	30532	30531	30530	30531	30537	30531	30535	30538	30538	30535	30533	30537	30531
25	30538	30534	30531	30531	30534	30532	30537	30536	30536	30538	30537	30534	30531	30538	30531
30	30536	30539	30531	30532	30534	30529	30537	30534	30535	30537	30537	30533	30532	30553	30536
40	30539	30536	30535	30538	30533	30531	30536	30538	30535	30537	30553	30532	30553	30553	30539

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	30524 bytes	–	100%
1,000	30514 bytes	-10 bytes	100%
10,000	30512 bytes	-2 bytes	100%
100,000	30510 bytes	-2 bytes	1.16%
1,000,000	30506 bytes	-4 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)	30616 bytes	+110 bytes (+0.36%)	–
1	30616 bytes	+110 bytes (+0.36%)	–
2	30622 bytes	+116 bytes (+0.38%)	+6 bytes
3	30626 bytes	+120 bytes (+0.39%)	+10 bytes
4	30648 bytes	+142 bytes (+0.47%)	+32 bytes
5	30667 bytes	+161 bytes (+0.53%)	+51 bytes
6	30673 bytes	+167 bytes (+0.55%)	+57 bytes
7	30627 bytes	+121 bytes (+0.40%)	+11 bytes
8	30658 bytes	+152 bytes (+0.50%)	+42 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	25302 bytes	-5204 bytes (-17.06%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	26142 bytes	-4364 bytes (-14.31%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	27084 bytes	-3422 bytes (-11.22%)
Brotli (Wikipedia)	brotli	brotli -q 11	28666 bytes	-1840 bytes (-6.03%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	29311 bytes	-1195 bytes (-3.92%)
LZMA2 (Wikipedia)	xz	xz -9	29488 bytes	-1018 bytes (-3.34%)
Zstandard (Wikipedia)	zstd	zstd -19	30092 bytes	-414 bytes (-1.36%)

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.