Choose a version:
14% The original file has 540512 bytes (527.8k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 73261 bytes (71.5k, 14%).

After GZIP compression these minified files vary in size:
unpkg
  28741 bytes (28.1k)
CDN
Boot
  24631 bytes (24.1k)
CDN
cdnjs
  24631 bytes (24.1k)
CDN
gzip -6 (default)
  24434 bytes (23.9k)
local copy
gzip -9
  24365 bytes (23.8k)
local copy
7zip -mx=9 -tgzip
  23534 bytes (23.0k)
local copy
libdeflate -12
  23523 bytes (23.0k)
local copy
kzip -s0 -rn -b3
  23449 bytes (22.9k)
local copy
pigz -11 -n
  23406 bytes (22.9k)
local copy
Zopfli
  23373 bytes (22.8k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/lodash/lodash-4.17.14.min.js (or via HTTPS)

You will automatically get the smallest lodash 4.17.14 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 1258 bytes by using my lodash 4.17.14 Zopfli version instead of the best available CDN (5.38% smaller than cdnjs, 23373 vs. 24631 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 --i1000000 --mb8 --mls8 --bsr16 --lazy --ohh

(found July 12, 2019)
Description Value Parameter
iterations 1000000  --i1000000
maximum blocks 8  --mb8
maximum length score 8  --mls8
block splitting recursion 16  --bsr16
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/lodash/lodash/4.17.14/dist/lodash.min.js --location | md5sum
881d7e6bcc7ca7119a2d2e1a5dbc5c45  -
curl --silent --compressed https://minime.stephan-brumme.com/files/lodash/lodash-4.17.14.min.zopfli.js.gz | md5sum
881d7e6bcc7ca7119a2d2e1a5dbc5c45  -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/lodash/lodash/4.17.14/dist/lodash.min.js --location | sha1sum
fa6d2c709c821585c4ffd818a05ff98c6f23b77e  -
curl --silent --compressed https://minime.stephan-brumme.com/files/lodash/lodash-4.17.14.min.zopfli.js.gz | sha1sum
fa6d2c709c821585c4ffd818a05ff98c6f23b77e  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
unpkg 28741 bytes 881d7e6bcc7ca7119a2d2e1a5dbc5c45 (invalid)
Boot 24631 bytes 881d7e6bcc7ca7119a2d2e1a5dbc5c45 (invalid)
cdnjs 24631 bytes 881d7e6bcc7ca7119a2d2e1a5dbc5c45 (invalid)

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

Other Versions

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

4.17.15, 4.17.14, 4.17.13, 4.17.12, 4.17.11, 4.17.10, 4.17.9, 4.17.5, 4.17.4, 4.17.3, 4.17.2, 4.17.1, 4.17.0, 4.16.6, 4.16.5, 4.16.4, 4.16.3, 4.16.2, 4.16.1, 4.16.0, 4.15.0, 4.14.2, 4.14.1, 4.14.0, 4.13.1, 4.13.0, 4.12.0, 4.11.2, 4.11.1, 4.11.0, 4.10.0,
4.9.0, 4.8.2, 4.8.1, 4.8.0, 4.7.0, 4.6.1, 4.6.0, 4.5.1, 4.5.0, 4.4.0, 4.3.0, 4.2.1, 4.2.0, 4.1.0, 4.0.1, 4.0.0

The project site contains an overview how well these versions were compressed.
Other interesting projects are AngularJS, BackboneJS, Bootstrap, D3, Dojo, Ember, jQuery, Knockout, React, Socket.IO, ThreeJS, UnderscoreJS and Vue.

Changelog

Best Zopfli parameters so far:
Size Improvement Parameters Found
23373 bytes -1 byte zopfli --i1000000 --mls8 --bsr16 --lazy --ohh July 12, 2019 @ 00:36
23374 bytes -1 byte zopfli --i100000 --mls8 --bsr16 --lazy --ohh July 11, 2019 @ 17:25
23375 bytes -2 bytes zopfli --i10000 --mls8 --bsr16 --lazy --ohh July 11, 2019 @ 16:47
23377 bytes -1 byte zopfli --i1000 --mls8 --bsr16 --lazy --ohh July 11, 2019 @ 16:18
23378 bytes -8 bytes zopfli --i1000 --mls8 --bsr40 --lazy --ohh July 11, 2019 @ 15:33
23386 bytes -1 byte zopfli --i1000 --mls16384 --bsr8 --lazy --ohh July 11, 2019 @ 15:30
23387 bytes zopfli --i100 --mls8 --bsr16 --lazy --ohh July 11, 2019 @ 15:17

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

Most recent activity on July 12, 2019 @ 14:57.

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
23427 23427 23415 23417 23417 23418 23416 23416 23417 23473 23427 23431 23410 23430 23417
23406 23406 23416 23409 23409 23409 23413 23409 23420 23407 23400 23408 23404 23400 23410
23384 23386 23384 23402 23385 23395 23388 23397 23403 23383 23450 23408 23404 23384 23401
23386 23386 23385 23392 23385 23395 23388 23398 23402 23396 23436 23400 23405 23387 23407
23404 23386 23387 23388 23390 23396 23389 23385 23384 23437 23401 23409 23406 23384 23386
23387 23388 23385 23393 23385 23396 23388 23385 23423 23384 23397 23447 23403 23385 23385
23388 23390 23393 23388 23385 23386 23388 23388 23387 23383 23436 23403 23405 23384 23383
23387 23386 23402 23399 23386 23407 23404 23413 23407 23396 23402 23385 23403 23403 23410
23384 23386 23393 23385 23385 23385 23388 23394 23384 23384 23434 23402 23402 23403 23384
23386 23411 23397 23399 23386 23385 23397 23399 23404 23383 23396 23404 23404 23385 23408
23387 23386 23386 23385 23387 23394 23385 23385 23406 23401 23395 23405 23402 23387 23402
23393 23391 23388 23386 23387 23386 23385 23385 23402 23395 23396 23405 23403 23386 23407
23405 23384 23373 23404 23384 23386 23386 23388 23386 23384 23433 23445 23403 23385 23386
23386 23384 23387 23384 23384 23386 23385 23399 23401 23403 23386 23410 23418 23386 23385
23386 23386 23386 23400 23385 23395 23391 23399 23408 23396 23402 23406 23403 23385 23384
23387 23384 23386 23386 23389 23386 23400 23398 23403 23384 23437 23413 23405 23385 23384
23390 23384 23387 23398 23388 23387 23388 23402 23402 23438 23402 23449 23404 23385 23384
23387 23385 23392 23399 23385 23398 23385 23403 23401 23400 23385 23403 23404 23386 23386
23389 23384 23375 23400 23388 23385 23384 23385 23385 23399 23435 23408 23406 23418 23386
23386 23385 23388 23389 23388 23397 23389 23385 23383 23399 23385 23401 23403 23385 23383
23385 23386 23392 23390 23402 23386 23391 23399 23385 23402 23401 23405 23403 23385 23384
23386 23389 23387 23390 23386 23385 23386 23385 23383 23384 23402 23400 23404 23419 23386
23405 23387 23373 23399 23387 23394 23386 23386 23386 23403 23385 23396 23405 23384 23385

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 23387 bytes 100%
1,000 23377 bytes -10 bytes 100%
10,000 23375 bytes -2 bytes 100%
100,000 23374 bytes -1 byte 0.87%
1,000,000 23373 bytes -1 byte 0.58%
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
23477 bytes +104 bytes (+0.44%) +28 bytes
23628 bytes +255 bytes (+1.09%) +179 bytes
23507 bytes +134 bytes (+0.57%) +58 bytes
23449 bytes +76 bytes (+0.33%)
23475 bytes +102 bytes (+0.44%) +26 bytes
23471 bytes +98 bytes (+0.42%) +22 bytes
23475 bytes +102 bytes (+0.44%) +26 bytes
23500 bytes +127 bytes (+0.54%) +51 bytes
23512 bytes +139 bytes (+0.59%) +63 bytes

Non-DEFLATE Algorithms

Archivers based on completely different compression algorithms often produce superior results.
Unfortunately, browsers only support gzip compression at the moment.
However, support for Brotli is constantly growing - but your browser doesn't support it.
Algorithm Program Parameters Size Compared To Best Zopfli
ZPAQ (Wikipedia) zpaq zpaq -method 69 19623 bytes -3750 bytes (-16.04%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 20264 bytes -3109 bytes (-13.30%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 21078 bytes -2295 bytes (-9.82%)
Brotli (Wikipedia) brotli brotli -q 11 21809 bytes -1564 bytes (-6.69%)
LZMA2 (Wikipedia) xz xz -9 22340 bytes -1033 bytes (-4.42%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 22593 bytes -780 bytes (-3.34%)
Zstandard (Wikipedia) zstd zstd -19 23100 bytes -273 bytes (-1.17%)

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 2019.
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