Choose a version:
32% The original file has 239854 bytes (234.2k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 76004 bytes (74.2k, 32%).

After GZIP compression these minified files vary in size:
Boot
  31621 bytes (30.9k)
CDN
cdnjs
  27726 bytes (27.1k)
CDN
gzip -6 (default)
  27534 bytes (26.9k)
local copy
unpkg
  27498 bytes (26.9k)
CDN
gzip -9
  27495 bytes (26.9k)
local copy
jsdelivr
  27481 bytes (26.8k)
CDN
7zip -mx=9 -tgzip
  26638 bytes (26.0k)
local copy
libdeflate -12
  26624 bytes (26.0k)
local copy
kzip -s0 -rn -b1
  26610 bytes (26.0k)
local copy
pigz -11 -n
  26526 bytes (25.9k)
local copy
Zopfli
  26500 bytes (25.9k)
local copy
Zopfli (defluff)
  26499 bytes (25.9k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/vue/vue-2.2.1.min.js

You will automatically get the smallest Vue 2.2.1 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 981 bytes by using my Vue 2.2.1 Zopfli version instead of the best available CDN (3.70% smaller than jsdelivr, 26500 vs. 27481 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 --bsr6 --lazy --ohh

(found March 31, 2017)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 1024  --mls1024
block splitting recursion 6  --bsr6
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 1 more byte (26499 bytes).

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-2.2.1.min.js --location | md5sum
69b45faf9b28578ef336b6b6d974214e  -
curl --silent --compressed http://minime.stephan-brumme.com/files/vue/vue-2.2.1.min.zopfli.js.gz | md5sum
69b45faf9b28578ef336b6b6d974214e  -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/vuejs/vue/vue-2.2.1.min.js --location | sha1sum
742473b28df25dec4b8d9384a8f83bcbacfe41e3  -
curl --silent --compressed http://minime.stephan-brumme.com/files/vue/vue-2.2.1.min.zopfli.js.gz | sha1sum
742473b28df25dec4b8d9384a8f83bcbacfe41e3  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 31621 bytes 69b45faf9b28578ef336b6b6d974214e (invalid)
cdnjs 27726 bytes 69b45faf9b28578ef336b6b6d974214e (invalid)
unpkg 27498 bytes 69b45faf9b28578ef336b6b6d974214e March 23, 2017 @ 07:54
jsdelivr 27481 bytes 69b45faf9b28578ef336b6b6d974214e (invalid)

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

Other Versions

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

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
26500 bytes -2 bytes zopfli --i100000 --mls1024 --bsr6 --lazy --ohh March 31, 2017 @ 21:21
26502 bytes -1 byte zopfli --i100000 --mls512 --bsr6 --lazy --ohh March 31, 2017 @ 20:25
26503 bytes -2 bytes zopfli --i10000 --mls1024 --bsr6 --lazy --ohh March 30, 2017 @ 21:21
26505 bytes -1 byte zopfli --i10000 --mls128 --bsr17 --lazy --ohh March 30, 2017 @ 21:07
26506 bytes -3 bytes zopfli --i10000 --mls128 --bsr14 --lazy --ohh March 30, 2017 @ 20:58
26509 bytes -1 byte zopfli --i1000 --mls128 --bsr18 --lazy --ohh March 30, 2017 @ 14:19
26510 bytes -1 byte zopfli --i1000 --mls128 --bsr14 --lazy --ohh March 30, 2017 @ 14:17
26511 bytes -2 bytes zopfli --i1000 --mls512 --bsr40 --lazy --ohh March 30, 2017 @ 14:14
26513 bytes -1 byte zopfli --i1000 --mls4 --bsr21 --lazy --ohh March 30, 2017 @ 14:14
26514 bytes -2 bytes zopfli --i1000 --mls8 --bsr30 --lazy --ohh March 30, 2017 @ 14:12
26516 bytes zopfli --i100 --mls16 --bsr4 --lazy --ohh March 30, 2017 @ 13:25

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

Most recent activity on April 10, 2017 @ 17:36.

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
26523 26522 26523 26522 26522 26524 26526 26522 26519 26547 26548 26572 26562 26563 26566
26520 26521 26521 26504 26511 26559 26530 26513 26508 26516 26544 26552 26552 26547 26557
26508 26505 26508 26510 26531 26545 26515 26544 26502 26500 26548 26555 26551 26546 26555
26513 26538 26513 26509 26513 26515 26542 26554 26516 26541 26551 26556 26550 26550 26549
26516 26521 26514 26518 26518 26536 26520 26552 26509 26512 26544 26561 26552 26546 26557
26518 26520 26510 26511 26511 26549 26504 26556 26511 26510 26552 26551 26551 26547 26546
26544 26545 26544 26550 26559 26549 26527 26557 26503 26511 26545 26553 26549 26549 26554
26516 26516 26512 26547 26543 26540 26540 26518 26515 26544 26546 26552 26546 26544 26555
26514 26519 26505 26509 26527 26556 26508 26549 26503 26549 26555 26549 26547 26547 26554
26553 26529 26549 26511 26514 26509 26509 26510 26516 26540 26554 26552 26546 26544 26563
26542 26546 26509 26509 26550 26551 26502 26522 26551 26512 26547 26547 26555 26544 26551
26516 26519 26544 26546 26517 26505 26548 26554 26516 26513 26550 26551 26546 26545 26555
26511 26515 26509 26509 26512 26511 26504 26544 26513 26544 26517 26547 26546 26547 26557
26517 26509 26505 26510 26524 26522 26503 26552 26510 26515 26518 26551 26547 26551 26552
26545 26519 26512 26509 26510 26507 26503 26570 26508 26514 26543 26551 26555 26546 26550
26521 26521 26505 26510 26530 26534 26510 26553 26503 26511 26552 26554 26552 26547 26550
26515 26519 26514 26505 26523 26555 26508 26554 26545 26542 26550 26551 26551 26551 26552
26515 26505 26513 26509 26511 26512 26501 26555 26510 26510 26548 26553 26549 26546 26557
26512 26511 26509 26507 26511 26545 26503 26509 26514 26513 26543 26551 26551 26548 26557
26514 26542 26513 26503 26512 26552 26511 26555 26508 26511 26552 26548 26552 26547 26550
26515 26518 26516 26504 26514 26556 26505 26554 26517 26509 26552 26551 26546 26546 26552
26513 26514 26509 26509 26510 26509 26504 26515 26518 26514 26547 26551 26551 26544 26552
26511 26519 26505 26511 26509 26544 26508 26510 26502 26511 26504 26547 26547 26543 26551

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 26516 bytes 100%
1,000 26509 bytes -7 bytes 100%
10,000 26503 bytes -6 bytes 100%
100,000 26500 bytes -3 bytes 7.54%
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
26610 bytes +110 bytes (+0.42%)
26610 bytes +110 bytes (+0.42%)
26620 bytes +120 bytes (+0.45%) +10 bytes
26618 bytes +118 bytes (+0.45%) +8 bytes
26630 bytes +130 bytes (+0.49%) +20 bytes
26639 bytes +139 bytes (+0.52%) +29 bytes
26662 bytes +162 bytes (+0.61%) +52 bytes
26702 bytes +202 bytes (+0.76%) +92 bytes
26736 bytes +236 bytes (+0.89%) +126 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 22141 bytes -4359 bytes (-16.45%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 22703 bytes -3797 bytes (-14.33%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 23074 bytes -3426 bytes (-12.93%)
Brotli (Wikipedia) brotli brotli -q 11 24818 bytes -1682 bytes (-6.35%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 25416 bytes -1084 bytes (-4.09%)
LZMA2 (Wikipedia) xz xz -9 25592 bytes -908 bytes (-3.43%)
ZSTD (Wikipedia) zstd zstd -19 26196 bytes -304 bytes (-1.15%)

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 2018.
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