Choose a version:
32% The original file has 222777 bytes (217.6k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 72063 bytes (70.4k, 32%).

After GZIP compression these minified files vary in size:
Boot
  30240 bytes (29.5k)
CDN, direct link
cdnjs
  26523 bytes (25.9k)
CDN, direct link
unpkg
  26393 bytes (25.8k)
CDN, direct link
gzip -6 (default)
  26380 bytes (25.8k)
local copy
gzip -9
  26352 bytes (25.7k)
local copy
jsdelivr
  26339 bytes (25.7k)
CDN, direct link
kzip -s0 -rn -b0
  25492 bytes (24.9k)
local copy
7zip -mx=9 -tgzip
  25486 bytes (24.9k)
local copy
libdeflate -12
  25480 bytes (24.9k)
local copy
pigz -11 -n
  25441 bytes (24.8k)
local copy
Zopfli
  25385 bytes (24.8k)
local copy
Zopfli (defluff)
  25384 bytes (24.8k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/vue/vue-2.1.8.min.js

You will automatically get the smallest Vue 2.1.8 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 954 bytes by using my Vue 2.1.8 Zopfli version instead of the best available CDN (3.76% smaller than jsdelivr, 25385 vs. 26339 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 --mls128 --bsr8 --lazy --ohh

(found April 4, 2017)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 128  --mls128
block splitting recursion 8  --bsr8
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 (25384 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-2.1.8.min.js --location | md5sum
f268252a2a717a87f0864742360be9a6  -
curl --silent --compressed http://minime.stephan-brumme.com/files/vue/vue-2.1.8.min.zopfli.js.gz | md5sum
f268252a2a717a87f0864742360be9a6  -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/vuejs/vue/vue-2.1.8.min.js --location | sha1sum
9801065482eef43a7d4404c234c359dc243a26b9  -
curl --silent --compressed http://minime.stephan-brumme.com/files/vue/vue-2.1.8.min.zopfli.js.gz | sha1sum
9801065482eef43a7d4404c234c359dc243a26b9  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 30240 bytes f268252a2a717a87f0864742360be9a6 (invalid)
cdnjs 26523 bytes f268252a2a717a87f0864742360be9a6 (invalid)
unpkg 26393 bytes f268252a2a717a87f0864742360be9a6 April 4, 2017 @ 10:09
jsdelivr 26339 bytes f268252a2a717a87f0864742360be9a6 (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
25385 bytes -5 bytes zopfli --i100000 --mls128 --bsr8 --lazy --ohh April 4, 2017 @ 12:23
25390 bytes -4 bytes zopfli --i10000 --mls128 --bsr8 --lazy --ohh April 4, 2017 @ 11:53
25394 bytes -3 bytes zopfli --i1000 --mls128 --bsr8 --lazy --ohh April 4, 2017 @ 10:39
25397 bytes zopfli --i100 --mls128 --bsr8 --lazy --ohh April 4, 2017 @ 10:30

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 @ 04:49.

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
25451 25453 25443 25441 25443 25436 25443 25443 25440 25445 25444 25450 25430 25432 25441
25433 25429 25423 25433 25433 25431 25435 25404 25439 25445 25447 25442 25444 25421 25441
25421 25425 25435 25424 25431 25433 25444 25435 25402 25420 25442 25442 25428 25428 25446
25427 25427 25430 25430 25435 25438 25427 25429 25440 25434 25439 25443 25442 25433 25422
25433 25397 25437 25432 25436 25433 25385 25415 25394 25405 25441 25442 25421 25425 25419
25430 25434 25434 25427 25432 25429 25430 25443 25422 25424 25423 25441 25420 25429 25426
25435 25419 25417 25428 25425 25430 25426 25422 25432 25424 25426 25426 25425 25419 25418
25430 25429 25428 25428 25403 25425 25427 25443 25401 25404 25422 25423 25424 25429 25420
25427 25427 25435 25427 25434 25431 25435 25427 25398 25423 25424 25425 25427 25424 25417
25420 25426 25433 25431 25422 25426 25425 25430 25420 25424 25425 25424 25424 25426 25430
25434 25427 25420 25427 25424 25427 25426 25426 25428 25424 25426 25432 25419 25427 25425
25426 25427 25425 25430 25431 25426 25422 25427 25422 25423 25424 25423 25425 25427 25420
25424 25427 25429 25428 25423 25425 25438 25422 25429 25442 25423 25424 25420 25424 25427
25427 25431 25429 25428 25429 25429 25423 25423 25389 25423 25442 25443 25425 25431 25422
25424 25424 25418 25427 25423 25425 25426 25422 25429 25424 25442 25442 25425 25417 25426
25422 25426 25433 25428 25424 25426 25413 25424 25422 25427 25442 25444 25428 25430 25427
25425 25428 25426 25430 25424 25426 25429 25428 25423 25441 25427 25425 25420 25426 25428
25424 25423 25429 25432 25434 25426 25433 25420 25431 25427 25447 25424 25424 25428 25420
25419 25426 25419 25426 25431 25426 25426 25428 25423 25431 25425 25424 25421 25433 25420
25434 25426 25432 25430 25422 25427 25413 25428 25429 25438 25424 25423 25426 25429 25420
25426 25426 25432 25432 25425 25426 25424 25420 25400 25423 25424 25424 25421 25428 25427
25422 25425 25419 25425 25424 25426 25422 25424 25401 25425 25424 25426 25425 25426 25427
25427 25425 25432 25430 25430 25424 25424 25433 25429 25430 25424 25433 25426 25423 25423

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 25397 bytes 100%
1,000 25394 bytes -3 bytes 100%
10,000 25390 bytes -4 bytes 100%
100,000 25385 bytes -5 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
25492 bytes +107 bytes (+0.42%)
25493 bytes +108 bytes (+0.43%) +1 byte
25498 bytes +113 bytes (+0.45%) +6 bytes
25498 bytes +113 bytes (+0.45%) +6 bytes
25498 bytes +113 bytes (+0.45%) +6 bytes
25516 bytes +131 bytes (+0.52%) +24 bytes
25559 bytes +174 bytes (+0.69%) +67 bytes
25582 bytes +197 bytes (+0.78%) +90 bytes
25587 bytes +202 bytes (+0.80%) +95 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 21251 bytes -4134 bytes (-16.29%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 21761 bytes -3624 bytes (-14.28%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 21822 bytes -3563 bytes (-14.04%)
Brotli (Wikipedia) brotli brotli -q 11 23817 bytes -1568 bytes (-6.18%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 24414 bytes -971 bytes (-3.83%)
LZMA2 (Wikipedia) xz xz -9 24476 bytes -909 bytes (-3.58%)
ZSTD (Wikipedia) zstd zstd -19 25060 bytes -325 bytes (-1.28%)

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