Use the TraceMonkey JavaScript engine
TraceMonkey adds native code compilation to Mozilla’s
JavaScript engine (known as 'SpiderMonkey'). It is based on a technique
developed at UC
Irvine called 'trace trees'. This optimization technique adds
just-in-time native code compilation with the effect that slow
Javascript is converted into fast x86
code. Tracing works by watching for commonly-repeated actions (such as
loops, function calls, or type checking) and tries to optimize their
resulting native code into the lowest number of actions.
The net result is a massive performance increase both in
the browser chrome and Web‐page content. Some functions can run more
than 20 to 40 times faster.
TraceMonkey is in an advanced stage of
development and is now included in the latest stable release of
Firefox (v3.5x). So, if you haven't already, update to this
version and then for an added performance boost:
- open a new tab
- type "about:config" and accept the warning
- enter "jit" in the filter box
- change the value of 'javascript.options.jit.chrome'
to (true)
- check the value of 'javascript.options.jit.content' is
set to true
(jit.chrome is not officially supported yet)
Voilà! You are now running the fastest Javascript engine!
Alternatively,
if you don't want to update your stable version of Firefox to 3.5, you
can always install the latest
nightly build of Firefox (available to download at
ftp://ftp.mozilla.org/pub/firefox/nightly/latest-trunk/) in a separate
directory. This pre-release version is called Minefield. You will need
to enable both
javascript.options.jit.chrome and javascript.options.jit.content as
above.
Advanced TCP Tweaks
Pipelining is an aggressive technique that lets a
browser send multiple requests before any responses are received, often
reducing
page download times. Some servers don't support pipelining. The
following tweaks (including enabling pipelining) should not be used if
you are on a narrowband connection.
browser.tabs.showSingleWindowModePrefs
– true
network.http.max-connections – 48
network.http.max-connections-per-server – 16
network.http.max-persistent-connections-per-proxy – 8
network.http.max-persistent-connections-per-server – 4
network.http.pipelining – true
network.http.pipelining.maxrequests – 8
network.http.proxy.pipelining – true
network.http.request.timeout – 300
content.notify.ontimer - true
Other tweaks worth employing are:
trim_on_minimize - true (Windows only)
content.interrupt.parsing - true
content.max.tokenizing.time - 2250000
content.maxtextrun - 8191
content.notify.interval - 750000
content.switch.threshold - 750000
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