Choose a version:
31% The original file has 282040 bytes (275.4k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 86379 bytes (84.4k, 31%).

After GZIP compression these minified files vary in size:
Boot
  36087 bytes (35.2k)
CDN
cdnjs
  31734 bytes (31.0k)
CDN
gzip -6 (default)
  31550 bytes (30.8k)
local copy
unpkg
  31516 bytes (30.8k)
CDN
gzip -9
  31495 bytes (30.8k)
local copy
libdeflate -12
  30521 bytes (29.8k)
local copy
7zip -mx=9 -tgzip
  30479 bytes (29.8k)
local copy
kzip -s0 -rn -b1
  30470 bytes (29.8k)
local copy
pigz -11 -n
  30425 bytes (29.7k)
local copy
Zopfli
  30369 bytes (29.7k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/vue/vue-2.5.4.min.js

You will automatically get the smallest Vue 2.5.4 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 1147 bytes by using my Vue 2.5.4 Zopfli version instead of the best available CDN (3.78% smaller than unpkg, 30369 vs. 31516 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 --mls2 --bsr11 --lazy --ohh

(found November 17, 2017)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 2  --mls2
block splitting recursion 11  --bsr11
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-2.5.4.min.js --location | md5sum
479de7f01223082367465789569ff46a  -
curl --silent --compressed http://minime.stephan-brumme.com/files/vue/vue-2.5.4.min.zopfli.js.gz | md5sum
479de7f01223082367465789569ff46a  -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/vuejs/vue/vue-2.5.4.min.js --location | sha1sum
1c16e37d2579539d9ca6113c07c9e864ffa7e38a  -
curl --silent --compressed http://minime.stephan-brumme.com/files/vue/vue-2.5.4.min.zopfli.js.gz | sha1sum
1c16e37d2579539d9ca6113c07c9e864ffa7e38a  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 36087 bytes 479de7f01223082367465789569ff46a November 22, 2017 @ 09:14
cdnjs 31734 bytes 479de7f01223082367465789569ff46a (invalid)
unpkg 31516 bytes 479de7f01223082367465789569ff46a (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
30369 bytes -5 bytes zopfli --i100000 --mls2 --bsr11 --lazy --ohh November 17, 2017 @ 11:49
30374 bytes -1 byte zopfli --i10000 --mls2 --bsr11 --lazy --ohh November 17, 2017 @ 11:18
30375 bytes -2 bytes zopfli --i10000 --mls2 --bsr15 --lazy --ohh November 17, 2017 @ 11:16
30377 bytes -2 bytes zopfli --i1000 --mls2 --bsr11 --lazy --ohh November 17, 2017 @ 10:58
30379 bytes -4 bytes zopfli --i1000 --mls2 --bsr15 --lazy --ohh November 17, 2017 @ 10:58
30383 bytes zopfli --i100 --mls2 --bsr40 --lazy --ohh November 17, 2017 @ 10:55

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

Most recent activity on November 22, 2017 @ 09:14.

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
30427 30428 30420 30426 30419 30409 30417 30419 30417 30414 30415 30413 30395 30399 30411
30400 30421 30399 30400 30399 30418 30417 30420 30419 30397 30398 30419 30396 30404 30394
30395 30398 30404 30394 30394 30399 30415 30398 30414 30396 30402 30415 30396 30404 30396
30414 30415 30403 30393 30398 30401 30399 30394 30414 30392 30415 30414 30423 30398 30402
30378 30398 30419 30421 30411 30398 30415 30396 30415 30394 30415 30414 30396 30414 30403
30394 30415 30417 30413 30414 30415 30414 30394 30415 30402 30410 30413 30420 30415 30408
30415 30401 30397 30397 30397 30397 30414 30395 30414 30398 30411 30414 30423 30395 30397
30369 30391 30418 30397 30395 30400 30398 30421 30415 30399 30415 30409 30396 30404 30406
30397 30394 30393 30396 30399 30398 30414 30421 30415 30400 30415 30416 30420 30398 30396
30394 30401 30395 30401 30394 30398 30415 30396 30415 30403 30415 30413 30420 30406 30404
30397 30399 30402 30401 30403 30401 30414 30399 30415 30397 30415 30413 30420 30405 30405
30374 30389 30403 30394 30397 30399 30414 30394 30416 30395 30415 30416 30420 30404 30403
30396 30394 30398 30396 30399 30402 30415 30395 30415 30398 30415 30413 30396 30407 30403
30394 30418 30396 30394 30404 30399 30398 30398 30414 30399 30415 30413 30396 30409 30403
30414 30415 30415 30422 30415 30399 30398 30395 30415 30400 30415 30416 30420 30406 30406
30409 30397 30414 30415 30416 30393 30415 30399 30415 30395 30415 30409 30397 30404 30416
30394 30381 30400 30397 30402 30398 30411 30396 30415 30394 30411 30416 30419 30404 30405
30394 30382 30399 30400 30399 30415 30415 30398 30414 30400 30415 30413 30421 30406 30406
30395 30415 30400 30398 30403 30398 30414 30396 30415 30393 30413 30409 30419 30397 30397
30395 30380 30394 30395 30395 30399 30414 30398 30414 30395 30415 30409 30396 30405 30404
30396 30416 30402 30415 30399 30398 30414 30397 30415 30397 30415 30414 30420 30405 30409
30398 30389 30398 30394 30395 30400 30397 30420 30410 30395 30415 30416 30420 30396 30403
30375 30393 30399 30394 30395 30399 30415 30393 30415 30398 30415 30409 30397 30397 30406

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 30383 bytes 100%
1,000 30377 bytes -6 bytes 100%
10,000 30374 bytes -3 bytes 100%
100,000 30369 bytes -5 bytes 0.87%
1,000,000 30369 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
30473 bytes +104 bytes (+0.34%) +3 bytes
30470 bytes +101 bytes (+0.33%)
30487 bytes +118 bytes (+0.39%) +17 bytes
30472 bytes +103 bytes (+0.34%) +2 bytes
30486 bytes +117 bytes (+0.39%) +16 bytes
30511 bytes +142 bytes (+0.47%) +41 bytes
30540 bytes +171 bytes (+0.56%) +70 bytes
30578 bytes +209 bytes (+0.69%) +108 bytes
30596 bytes +227 bytes (+0.75%) +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 24875 bytes -5494 bytes (-18.09%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 25733 bytes -4636 bytes (-15.27%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 26813 bytes -3556 bytes (-11.71%)
Brotli (Wikipedia) brotli brotli -q 11 28222 bytes -2147 bytes (-7.07%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 28807 bytes -1562 bytes (-5.14%)
LZMA2 (Wikipedia) xz xz -9 29028 bytes -1341 bytes (-4.42%)
ZSTD (Wikipedia) zstd zstd -19 29802 bytes -567 bytes (-1.87%)

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