Choose a version:
32% The original file has 224105 bytes (218.9k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 72671 bytes (71.0k, 32%).

After GZIP compression these minified files vary in size:
Boot
  30376 bytes (29.7k)
CDN, direct link
cdnjs
  26623 bytes (26.0k)
CDN, direct link
unpkg
  26495 bytes (25.9k)
CDN, direct link
gzip -6 (default)
  26489 bytes (25.9k)
local copy
gzip -9
  26462 bytes (25.8k)
local copy
jsdelivr
  26451 bytes (25.8k)
CDN, direct link
kzip -s0 -rn -b0
  25626 bytes (25.0k)
local copy
7zip -mx=9 -tgzip
  25622 bytes (25.0k)
local copy
libdeflate -12
  25602 bytes (25.0k)
local copy
pigz -11 -n
  25569 bytes (25.0k)
local copy
Zopfli
  25520 bytes (24.9k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/vue/vue-2.1.9.min.js

You will automatically get the smallest Vue 2.1.9 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 931 bytes by using my Vue 2.1.9 Zopfli version instead of the best available CDN (3.65% smaller than jsdelivr, 25520 vs. 26451 bytes):
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 --mls1024 --bsr22 --lazy --ohh

(found April 4, 2017)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 1024  --mls1024
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-2.1.9.min.js --location | md5sum
3d8dc4bec6386b75fa237b2bca127ae5  -
curl --silent --compressed http://minime.stephan-brumme.com/files/vue/vue-2.1.9.min.zopfli.js.gz | md5sum
3d8dc4bec6386b75fa237b2bca127ae5  -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/vuejs/vue/vue-2.1.9.min.js --location | sha1sum
4c53997ff2ff2a51bf928324699b3847d0ef84b4  -
curl --silent --compressed http://minime.stephan-brumme.com/files/vue/vue-2.1.9.min.zopfli.js.gz | sha1sum
4c53997ff2ff2a51bf928324699b3847d0ef84b4  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 30376 bytes 3d8dc4bec6386b75fa237b2bca127ae5 (invalid)
cdnjs 26623 bytes 3d8dc4bec6386b75fa237b2bca127ae5 (invalid)
unpkg 26495 bytes 3d8dc4bec6386b75fa237b2bca127ae5 April 4, 2017 @ 10:09
jsdelivr 26451 bytes 3d8dc4bec6386b75fa237b2bca127ae5 (invalid)

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

Other Versions

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

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
25520 bytes -3 bytes zopfli --i100000 --mls1024 --bsr22 --lazy --ohh April 4, 2017 @ 14:22
25523 bytes -3 bytes zopfli --i10000 --mls1024 --bsr22 --lazy --ohh April 4, 2017 @ 12:55
25526 bytes -3 bytes zopfli --i1000 --mls1024 --bsr22 --lazy --ohh April 4, 2017 @ 10:46
25529 bytes zopfli --i100 --mls1024 --bsr22 --lazy --ohh April 4, 2017 @ 10:21

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

Most recent activity on April 11, 2017 @ 04:32.

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
25562 25561 25566 25567 25552 25565 25556 25561 25568 25576 25577 25578 25575 25557 25568
25555 25553 25555 25569 25563 25556 25551 25558 25563 25565 25572 25575 25548 25550 25572
25557 25559 25552 25554 25563 25564 25568 25566 25563 25568 25572 25572 25551 25547 25546
25554 25561 25554 25562 25551 25561 25555 25556 25557 25553 25577 25578 25546 25551 25544
25556 25555 25554 25559 25551 25551 25564 25565 25525 25576 25571 25574 25577 25553 25543
25553 25555 25551 25554 25557 25551 25550 25559 25556 25555 25576 25556 25553 25548 25543
25550 25554 25548 25557 25548 25556 25555 25557 25553 25573 25554 25552 25556 25550 25546
25554 25556 25557 25562 25554 25566 25555 25554 25552 25552 25550 25550 25548 25546 25542
25552 25559 25554 25548 25553 25551 25556 25554 25547 25562 25555 25555 25548 25552 25542
25557 25553 25554 25555 25553 25551 25552 25551 25548 25550 25553 25553 25549 25550 25544
25552 25560 25550 25551 25555 25555 25555 25558 25549 25556 25557 25549 25545 25548 25545
25555 25558 25556 25557 25550 25551 25556 25550 25555 25552 25557 25553 25542 25550 25544
25552 25555 25555 25558 25555 25551 25555 25563 25554 25556 25550 25547 25553 25546 25548
25551 25555 25552 25555 25552 25550 25557 25553 25547 25554 25550 25573 25554 25546 25543
25549 25554 25552 25563 25557 25551 25556 25553 25552 25551 25572 25548 25553 25550 25544
25556 25557 25556 25560 25555 25565 25555 25569 25557 25532 25570 25548 25547 25547 25544
25551 25556 25556 25554 25556 25552 25556 25554 25552 25531 25555 25549 25541 25549 25542
25550 25554 25554 25557 25557 25550 25556 25555 25555 25556 25549 25554 25547 25547 25543
25549 25557 25558 25555 25556 25557 25556 25563 25553 25520 25555 25551 25547 25547 25543
25547 25554 25555 25553 25551 25551 25556 25553 25552 25554 25554 25550 25548 25547 25542
25548 25555 25553 25556 25563 25550 25556 25553 25566 25555 25554 25550 25541 25550 25542
25557 25554 25553 25557 25553 25551 25553 25561 25552 25554 25554 25552 25546 25548 25545
25552 25554 25553 25553 25554 25552 25553 25559 25554 25531 25556 25551 25553 25549 25544

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 25529 bytes 100%
1,000 25526 bytes -3 bytes 100%
10,000 25523 bytes -3 bytes 100%
100,000 25520 bytes -3 bytes 1.74%
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
25626 bytes +106 bytes (+0.42%)
25627 bytes +107 bytes (+0.42%) +1 byte
25628 bytes +108 bytes (+0.42%) +2 bytes
25630 bytes +110 bytes (+0.43%) +4 bytes
25628 bytes +108 bytes (+0.42%) +2 bytes
25640 bytes +120 bytes (+0.47%) +14 bytes
25680 bytes +160 bytes (+0.63%) +54 bytes
25709 bytes +189 bytes (+0.74%) +83 bytes
25705 bytes +185 bytes (+0.72%) +79 bytes

Non-DEFLATE Algorithms

Archivers based on completely different compression algorithms often produce superior results.
Unfortunately, browsers only support gzip compression at the moment.
Algorithm Program Parameters Size Compared To Best Zopfli
ZPAQ (Wikipedia) zpaq zpaq -method 69 21306 bytes -4214 bytes (-16.51%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 21794 bytes -3726 bytes (-14.60%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 21856 bytes -3664 bytes (-14.36%)
Brotli (Wikipedia) brotli brotli -q 11 23877 bytes -1643 bytes (-6.44%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 24456 bytes -1064 bytes (-4.17%)
LZMA2 (Wikipedia) xz xz -9 24580 bytes -940 bytes (-3.68%)
ZSTD (Wikipedia) zstd zstd -19 25160 bytes -360 bytes (-1.41%)

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):


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 2017.
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