Choose a version:
47% The original file has 120619 bytes (117.8k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 57254 bytes (55.9k, 47%).

After GZIP compression these minified files vary in size:
Microsoft
  24895 bytes (24.3k)
CDN, direct link
Boot
  22610 bytes (22.1k)
CDN, direct link
Baidu
  19837 bytes (19.4k)
CDN, direct link
cdnjs
  19833 bytes (19.4k)
CDN, direct link
gzip -6 (default)
  19761 bytes (19.3k)
local copy
Google
  19741 bytes (19.3k)
CDN, direct link
cdnhttps
  19741 bytes (19.3k)
CDN, direct link
gzip -9
  19731 bytes (19.3k)
local copy
libdeflate -12
  19137 bytes (18.7k)
local copy
7zip -mx=9 -tgzip
  19088 bytes (18.6k)
local copy
Yandex
  19075 bytes (18.6k)
CDN, direct link
pigz -11 -n
  19055 bytes (18.6k)
local copy
kzip -s0 -rn -b3
  19048 bytes (18.6k)
local copy
Zopfli
  19032 bytes (18.6k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/jquery/jquery-1.3.2.min.js

You will automatically get the smallest jQuery 1.3.2 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 43 bytes by using my jQuery 1.3.2 Zopfli version instead of the best available CDN (0.23% smaller than Yandex, 19032 vs. 19075 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 --mls64 --bsr40 --lazy --ohh

(found January 7, 2016)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 64  --mls64
block splitting recursion 40  --bsr40
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 http://code.jquery.com/jquery-1.3.2.min.js --location | md5sum
bb381e2d19d8eace86b34d20759491a5  -
curl --silent --compressed http://minime.stephan-brumme.com/files/jquery/jquery-1.3.2.min.zopfli.js.gz | md5sum
bb381e2d19d8eace86b34d20759491a5  -

SHA1:
curl --silent --compressed http://code.jquery.com/jquery-1.3.2.min.js --location | sha1sum
3dc9f7c2642efff4482e68c9d9df874bf98f5bcb  -
curl --silent --compressed http://minime.stephan-brumme.com/files/jquery/jquery-1.3.2.min.zopfli.js.gz | sha1sum
3dc9f7c2642efff4482e68c9d9df874bf98f5bcb  -

These CDNs send you the original file:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 22610 bytes bb381e2d19d8eace86b34d20759491a5 March 18, 2015 @ 09:41
cdnjs 19833 bytes bb381e2d19d8eace86b34d20759491a5 (invalid)
Google 19741 bytes bb381e2d19d8eace86b34d20759491a5 (invalid)
cdnhttps 19741 bytes bb381e2d19d8eace86b34d20759491a5 December 24, 2015 @ 07:33
Yandex 19075 bytes bb381e2d19d8eace86b34d20759491a5 June 15, 2015 @ 21:17

And some CDNs send you a different file:
CDN Size (compressed) MD5 (uncompressed) Comment / Diff Timestamp
Microsoft 24895 bytes 53703c0ed620dc4d9d0cd7a4dc0c9d5c < * http://jquery.com/
> * Copyright 2010, John Resig, http://jquery.com/
> * Distributed in whole under the terms of the MIT license
> * http://www.opensource.org/licenses/mit-license.php
< * Copyright (c) 2009 John Resig
< * Dual licensed under the MIT and GPL licenses.
< * http://docs.jquery.com/License
< *
< * Date: 2009-02-19 17:34:21 -0500 (Thu, 19 Feb 2009)
< * Revision: 6246
[...]
(invalid)
Baidu 19837 bytes 7d91ff87b2c0439ac76c5af0bccb877b only whitespaces differ January 7, 2015 @ 10:16

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

Other Versions

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

3.2.1, 3.2.0,
3.1.1, 3.1.0,
3.0.0,
2.2.4, 2.2.3, 2.2.2, 2.2.1, 2.2.0,
2.1.4, 2.1.3, 2.1.2, 2.1.1, 2.1.0,
2.0.3, 2.0.2, 2.0.1, 2.0.0,
1.12.4, 1.12.3, 1.12.2, 1.12.1, 1.12.0,
1.11.3, 1.11.2, 1.11.1, 1.11.0,
1.10.2, 1.10.1, 1.10.0,
1.9.1, 1.9.0,
1.8.3, 1.8.2, 1.8.1, 1.8.0,
1.7.2, 1.7.1, 1.7.0,
1.6.4, 1.6.3, 1.6.2, 1.6.1, 1.6,
1.5.2, 1.5.1, 1.5,
1.4.4, 1.4.3, 1.4.2, 1.4.1, 1.4,
1.3.2, 1.3.1, 1.3,
1.2.6, 1.2.5, 1.2.4, 1.2.3, 1.2.2, 1.2.1, 1.2,
1.1.4, 1.1.3, 1.1.2, 1.1.1, 1.1,
1.0.4, 1.0.3, 1.0.2, 1.0.1, 1.0

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

Changelog

Best Zopfli parameters so far:
Size Improvement Parameters Found
19032 bytes -1 byte zopfli --i100000 --mls64 --bsr40 --lazy --ohh January 7, 2016 @ 15:58
19033 bytes -1 byte zopfli --i100000 --mls2 --bsr18 --lazy --ohh September 23, 2015 @ 16:10
19034 bytes -3 bytes zopfli --i10000 --mls2 --bsr18 --lazy --ohh September 23, 2015 @ 15:33
19037 bytes -1 byte zopfli --i1000 --mls2 --bsr21 --lazy --ohh September 23, 2015 @ 14:46
19038 bytes -1 byte zopfli --i1000 --mls2 --bsr18 --lazy --ohh September 23, 2015 @ 14:45
19039 bytes -1 byte zopfli --i100000 --mls512 --bsr11 --lazy --ohh September 2, 2015 @ 01:39
19040 bytes -3 bytes zopfli --i10000 --mls512 --bsr11 --lazy --ohh September 1, 2015 @ 21:27
19043 bytes -2 bytes zopfli --i1000 --mls512 --bsr11 --lazy --ohh September 1, 2015 @ 20:39
19045 bytes -1 byte zopfli --i1000 --mls1024 --bsr11 --lazy --ohh September 1, 2015 @ 20:39
19046 bytes zopfli --i100 --mls2048 --bsr9 --lazy --ohh September 1, 2015 @ 20:18

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

Most recent activity on June 16, 2016 @ 14:39.

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
19076 19075 19075 19075 19074 19074 19078 19077 19078 19077 19063 19069 19069 19062 19078
19047 19053 19056 19054 19044 19045 19044 19053 19052 19040 19061 19057 19052 19061 19066
19051 19047 19048 19049 19051 19048 19051 19047 19051 19047 19052 19056 19054 19051 19057
19048 19044 19040 19040 19044 19040 19050 19046 19039 19040 19040 19040 19047 19077 19061
19049 19041 19039 19040 19039 19041 19051 19040 19041 19040 19059 19054 19049 19044 19048
19045 19048 19040 19044 19045 19045 19053 19040 19040 19039 19040 19052 19048 19073 19060
19046 19046 19049 19040 19046 19040 19047 19040 19042 19039 19047 19050 19047 19060 19050
19044 19047 19047 19050 19049 19046 19051 19047 19039 19041 19048 19046 19047 19052 19060
19052 19051 19045 19051 19049 19047 19047 19049 19050 19040 19062 19046 19057 19057 19050
19048 19045 19045 19041 19050 19048 19047 19046 19040 19040 19054 19048 19047 19068 19060
19045 19048 19049 19055 19053 19051 19046 19039 19040 19039 19054 19040 19049 19059 19060
19045 19044 19040 19041 19044 19048 19047 19040 19040 19041 19041 19046 19046 19055 19063
19044 19047 19048 19043 19048 19047 19040 19040 19040 19040 19052 19047 19047 19059 19061
19047 19045 19049 19043 19050 19040 19042 19040 19039 19040 19041 19047 19046 19055 19055
19033 19046 19039 19043 19042 19040 19040 19039 19043 19041 19053 19053 19047 19053 19048
19041 19051 19039 19050 19044 19052 19051 19043 19040 19041 19041 19047 19046 19055 19052
19044 19041 19044 19039 19046 19046 19044 19040 19040 19041 19052 19047 19050 19057 19060
19033 19045 19044 19044 19041 19046 19043 19045 19046 19043 19041 19046 19041 19056 19058
19045 19044 19044 19045 19044 19042 19045 19040 19042 19041 19040 19062 19048 19059 19064
19046 19044 19044 19042 19041 19047 19050 19039 19041 19040 19051 19047 19050 19057 19061
19045 19045 19040 19041 19049 19041 19047 19040 19043 19040 19059 19051 19049 19054 19053
19048 19044 19045 19050 19048 19048 19040 19040 19043 19040 19040 19058 19047 19057 19050
19046 19045 19044 19039 19041 19032 19047 19040 19043 19041 19041 19047 19048 19058 19063

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 19040 bytes 100%
1,000 19037 bytes -3 bytes 100%
10,000 19034 bytes -3 bytes 100%
100,000 19032 bytes -2 bytes 1.16%
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
19152 bytes +120 bytes (+0.63%) +104 bytes
19153 bytes +121 bytes (+0.64%) +105 bytes
19110 bytes +78 bytes (+0.41%) +62 bytes
19048 bytes +16 bytes (+0.08%)
19069 bytes +37 bytes (+0.19%) +21 bytes
19105 bytes +73 bytes (+0.38%) +57 bytes
19141 bytes +109 bytes (+0.57%) +93 bytes
19161 bytes +129 bytes (+0.68%) +113 bytes
19162 bytes +130 bytes (+0.68%) +114 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 15787 bytes -3245 bytes (-17.05%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 16137 bytes -2895 bytes (-15.21%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 17169 bytes -1863 bytes (-9.79%)
Brotli (Wikipedia) brotli brotli -q 11 17466 bytes -1566 bytes (-8.23%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 18065 bytes -967 bytes (-5.08%)
LZMA2 (Wikipedia) xz xz -9 18544 bytes -488 bytes (-2.56%)
ZSTD (Wikipedia) zstd zstd -19 18992 bytes -40 bytes (-0.21%)

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