Choose a version:
31% The original file has 283026 bytes (276.4k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 86400 bytes (84.4k, 31%).

After GZIP compression these minified files vary in size:
Boot
  36121 bytes (35.3k)
CDN
cdnjs
  31774 bytes (31.0k)
CDN
gzip -6 (default)
  31590 bytes (30.8k)
local copy
unpkg
  31556 bytes (30.8k)
CDN
gzip -9
  31538 bytes (30.8k)
local copy
libdeflate -12
  30564 bytes (29.8k)
local copy
7zip -mx=9 -tgzip
  30521 bytes (29.8k)
local copy
kzip -s0 -rn -b0
  30514 bytes (29.8k)
local copy
pigz -11 -n
  30464 bytes (29.8k)
local copy
Zopfli
  30432 bytes (29.7k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/vue/vue-2.5.8.min.js

You will automatically get the smallest Vue 2.5.8 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 1124 bytes by using my Vue 2.5.8 Zopfli version instead of the best available CDN (3.69% smaller than unpkg, 30432 vs. 31556 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 --bsr15 --lazy --ohh

(found November 28, 2017)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 1024  --mls1024
block splitting recursion 15  --bsr15
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-2.5.8.min.js --location | md5sum
d2d92307858e584e8b90a1523c0a5150  -
curl --silent --compressed http://minime.stephan-brumme.com/files/vue/vue-2.5.8.min.zopfli.js.gz | md5sum
d2d92307858e584e8b90a1523c0a5150  -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/vuejs/vue/vue-2.5.8.min.js --location | sha1sum
6b883b2c931c1cbf06ce373d27fe5051728b4d0b  -
curl --silent --compressed http://minime.stephan-brumme.com/files/vue/vue-2.5.8.min.zopfli.js.gz | sha1sum
6b883b2c931c1cbf06ce373d27fe5051728b4d0b  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 36121 bytes d2d92307858e584e8b90a1523c0a5150 (invalid)
cdnjs 31774 bytes d2d92307858e584e8b90a1523c0a5150 (invalid)
unpkg 31556 bytes d2d92307858e584e8b90a1523c0a5150 (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
30432 bytes -1 byte zopfli --i100000 --mls1024 --bsr15 --lazy --ohh November 28, 2017 @ 17:04
30433 bytes -1 byte zopfli --i100000 --mls2 --bsr6 --lazy --ohh November 28, 2017 @ 15:37
30434 bytes -1 byte zopfli --i10000 --mls2 --bsr6 --lazy --ohh November 28, 2017 @ 13:24
30435 bytes -4 bytes zopfli --i10000 --mls2 --bsr23 --lazy --ohh November 28, 2017 @ 13:21
30439 bytes -3 bytes zopfli --i1000 --mls4 --bsr20 --lazy --ohh November 28, 2017 @ 12:36
30442 bytes -2 bytes zopfli --i1000 --mls512 --bsr15 --lazy --ohh November 28, 2017 @ 12:35
30444 bytes zopfli --i100 --mls4 --bsr20 --lazy --ohh November 28, 2017 @ 12:02

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

Most recent activity on November 29, 2017 @ 09:59.

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
30472 30468 30456 30457 30464 30455 30457 30461 30456 30457 30457 30459 30440 30446 30451
30442 30443 30442 30442 30438 30440 30461 30462 30462 30441 30456 30457 30462 30449 30438
30433 30445 30438 30439 30435 30436 30440 30437 30437 30445 30456 30458 30462 30442 30444
30454 30461 30457 30438 30436 30438 30438 30437 30453 30438 30452 30452 30462 30436 30451
30447 30446 30460 30453 30456 30438 30438 30436 30453 30439 30451 30439 30457 30457 30443
30462 30456 30461 30457 30438 30439 30437 30462 30436 30437 30452 30437 30438 30442 30452
30455 30469 30437 30463 30437 30436 30438 30438 30438 30442 30437 30455 30466 30439 30447
30445 30452 30436 30437 30437 30438 30438 30466 30465 30438 30452 30437 30457 30438 30447
30435 30441 30438 30442 30437 30439 30440 30437 30465 30439 30452 30455 30441 30441 30447
30443 30445 30439 30438 30438 30438 30440 30437 30463 30443 30452 30439 30457 30447 30446
30444 30444 30443 30453 30440 30440 30435 30438 30436 30436 30456 30438 30441 30436 30451
30457 30461 30457 30438 30442 30441 30440 30437 30433 30432 30451 30452 30457 30436 30451
30436 30437 30440 30439 30440 30442 30437 30437 30435 30440 30437 30458 30458 30446 30450
30445 30462 30440 30440 30438 30440 30435 30436 30436 30438 30456 30439 30439 30438 30451
30459 30455 30457 30457 30441 30440 30440 30466 30435 30440 30456 30437 30452 30438 30450
30459 30461 30456 30457 30438 30439 30437 30435 30435 30436 30452 30437 30441 30440 30451
30440 30436 30444 30451 30455 30439 30438 30436 30438 30439 30452 30456 30449 30438 30451
30443 30456 30435 30442 30439 30438 30438 30437 30435 30439 30452 30459 30441 30438 30446
30458 30457 30457 30456 30438 30439 30437 30437 30435 30446 30452 30458 30448 30441 30450
30435 30448 30436 30441 30437 30440 30439 30437 30436 30442 30452 30436 30458 30448 30451
30433 30461 30457 30435 30438 30438 30438 30435 30435 30439 30456 30458 30457 30444 30443
30438 30461 30437 30438 30438 30442 30439 30437 30436 30439 30452 30437 30458 30448 30447
30443 30450 30436 30442 30438 30439 30438 30437 30436 30439 30456 30439 30462 30441 30438

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 30444 bytes 100%
1,000 30439 bytes -5 bytes 100%
10,000 30434 bytes -5 bytes 100%
100,000 30432 bytes -2 bytes 1.16%
1,000,000 30432 bytes 0.29%
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
30514 bytes +82 bytes (+0.27%)
30514 bytes +82 bytes (+0.27%)
30532 bytes +100 bytes (+0.33%) +18 bytes
30516 bytes +84 bytes (+0.28%) +2 bytes
30534 bytes +102 bytes (+0.34%) +20 bytes
30561 bytes +129 bytes (+0.42%) +47 bytes
30594 bytes +162 bytes (+0.53%) +80 bytes
30623 bytes +191 bytes (+0.63%) +109 bytes
30646 bytes +214 bytes (+0.70%) +132 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 24905 bytes -5527 bytes (-18.16%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 25769 bytes -4663 bytes (-15.32%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 26834 bytes -3598 bytes (-11.82%)
Brotli (Wikipedia) brotli brotli -q 11 28277 bytes -2155 bytes (-7.08%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 28848 bytes -1584 bytes (-5.21%)
LZMA2 (Wikipedia) xz xz -9 29076 bytes -1356 bytes (-4.46%)
ZSTD (Wikipedia) zstd zstd -19 29854 bytes -578 bytes (-1.90%)

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