Mihai Bazon
378ed17809
disable hoist_vars by default and change comparations to comparisons
2012-10-03 11:27:05 +03:00
Mihai Bazon
dde5b22b5e
support defines
2012-10-02 13:20:07 +03:00
Mihai Bazon
e1098b04a7
"use strict";
2012-10-02 12:45:58 +03:00
Mihai Bazon
211792757c
more constant folding (for names defined with const)
2012-10-02 12:45:17 +03:00
Mihai Bazon
ff696cd7bc
drop more unused names
2012-10-02 12:02:33 +03:00
Mihai Bazon
9e5dd81f1e
a shy attempt to obey width in the beautifier; added bracketize option to always print brackets around if/do/while/for statements; export more options via the CLI
2012-10-02 11:22:38 +03:00
Mihai Bazon
13278c6649
removed the "squeeze" method (it's now effectively "transform")
2012-09-26 19:52:32 +03:00
Mihai Bazon
15d58f5917
some speedup and more savings from unused vars that have side effects in initialization
2012-09-26 19:05:49 +03:00
Mihai Bazon
78be8f5296
compressor successfully moved to TreeTransformer
2012-09-26 14:27:01 +03:00
Mihai Bazon
a24e7ee976
checkpoint (refactoring, WIP)
2012-09-26 12:16:16 +03:00
Mihai Bazon
242dd10131
more cleanups
2012-09-25 20:39:15 +03:00
Mihai Bazon
9321d418bc
moving code around (refactoring, WIP)
2012-09-25 15:59:27 +03:00
Mihai Bazon
4201577dd7
started some refactoring (WIP) -- moving squeezer to TreeTransformer
2012-09-25 15:15:47 +03:00
Mihai Bazon
e836e2ae5f
minor
2012-09-25 12:48:36 +03:00
Mihai Bazon
ea6d1ea701
it's not safe to assume that property access is side-effect-free
...
(getters/setters + various browser bugs will trigger side effects; also, an
exception is thrown when the expression is undefined)
2012-09-25 10:32:14 +03:00
Mihai Bazon
368ac8f93c
some boolean cleanup
2012-09-25 10:31:03 +03:00
Mihai Bazon
a83b28503f
properly drop mutually-referring declarations that are not otherwise
...
referenced and have no side effects
2012-09-23 12:47:34 +03:00
Mihai Bazon
76d88b59dc
tree transformer api (WIP)
2012-09-22 19:41:09 +03:00
Mihai Bazon
ec7f895b54
log filename in parse errors / compressor warnings
2012-09-21 14:44:25 +03:00
Mihai Bazon
c4f8c2103f
more on detecting side effects
2012-09-21 11:23:44 +03:00
Mihai Bazon
e8da72d304
drop unused variables
2012-09-19 12:27:38 +03:00
Mihai Bazon
3da0ac4897
support for directives
2012-09-18 13:21:09 +03:00
Mihai Bazon
21968285e8
added AST_NaN (output as 0/0)
2012-09-18 10:53:46 +03:00
Mihai Bazon
d91613b4a8
only do the typeof x == "undefined" optimization if x is a symbol reference and it's declared in scope, or x is not a symbol reference.
2012-09-17 20:02:57 +03:00
Mihai Bazon
ee669ba878
moved typeof foo == "undefined" ==> foo === undefined under --unsafe
...
because 43fd45154b (commitcomment-1864505)
2012-09-17 18:49:52 +03:00
Mihai Bazon
e370e3b5a4
fix .undeclared (it's now a function)
2012-09-17 15:06:06 +03:00
Mihai Bazon
6ad414ef28
minor
2012-09-17 14:33:36 +03:00
Mihai Bazon
92e22c460d
possible optimization for AST_Undefined
...
if undefined is defined, ;-), we replace AST_Undefined nodes to a reference
to the "undefined" variable; in turn the mangler will compress it to a
single letter; this helps at least on jQuery.
2012-09-17 12:27:32 +03:00
Mihai Bazon
14481de0e9
empty block to empty statement: {} ==> ;
2012-09-17 12:03:02 +03:00
Mihai Bazon
07f1d56f69
more smallish optimizations
2012-09-17 11:50:35 +03:00
Mihai Bazon
5e60a60b3b
try negating AST_Binary
2012-09-17 11:16:44 +03:00
Mihai Bazon
5d781ec6f8
some cleanup
2012-09-16 18:10:54 +03:00
Mihai Bazon
0f418d654e
more sequencesizing (WIP)
2012-09-16 16:29:17 +03:00
Mihai Bazon
21c34a1792
drop unused function
2012-09-16 15:46:47 +03:00
Mihai Bazon
7b6a402916
rewrite handle_if_return
...
optimizations of if/return/continue seem to be even better now
2012-09-16 15:46:20 +03:00
Mihai Bazon
397bf56d25
other small optimization:
...
if (foo) continue;
...body...
==>
if (!foo) { ...body ... }
Only when the parent block is the target loop of the `continue` statement.
2012-09-15 16:10:35 +03:00
Mihai Bazon
86c14d0988
join_vars:
...
var XXX;
for (var YYY; ...)
==>
for (var XXX,YYY; ...)
2012-09-15 10:54:59 +03:00
Mihai Bazon
43fd45154b
compress typeof x == "undefined" to x === undefined, which further gets
...
shortened to x === void 0 (or x === [][0] in unsafe mode)
2012-09-14 19:56:59 +03:00
Mihai Bazon
50d1670e42
minor
...
when unsafe, compress undefined as [][0]
2012-09-14 19:04:18 +03:00
Mihai Bazon
5e83e7ec17
adding an imaginary "return undefined" can sometimes help
...
function f() {
if (foo) return x();
if (!bar) return y();
}
==>
function f() {
return foo ? x() : bar ? void 0 : y();
}
2012-09-14 16:26:30 +03:00
Mihai Bazon
924aa58060
more optimizations that v1 does and some cleanups
...
- a = a + x ==> a+=x
- joining consecutive var statements (hoisting is not always desirable)
- x == false ==> x == 0, x != true ==> x != 1
- x, x ==> x; x = exp(), x ==> x = exp()
- discarding useless break-s
2012-09-14 15:36:38 +03:00
Mihai Bazon
d72c1d1293
few more optimizations:
...
- do multiple passes in tighten_body if it was changed
- transform if (foo) return x; return y; ==> return foo?x:y
- don't optimize !0 as true (use best_of after evaluation of constant expr)
With hoist_vars off we now beat UglifyJS v1 on jQuery-1.8.1
2012-09-13 15:20:57 +03:00
Mihai Bazon
f5027ec1fc
minor
2012-09-12 16:29:20 +03:00
Mihai Bazon
a132841fb9
more AST_If optimizations
2012-09-12 16:10:03 +03:00
Mihai Bazon
2b1e4628e0
side effect fixes and small optimization for gzip
...
prefer to always use > and >= operators (idea from Closure)
2012-09-12 13:41:46 +03:00
Mihai Bazon
2b4093ba83
fixed run-tests and an issue about reversing the condition in AST_If
2012-09-12 13:00:13 +03:00
Mihai Bazon
9a629abe00
minor
2012-09-11 18:37:08 +03:00
Mihai Bazon
da407d46c6
checkpoint
...
- discard statements with no side effects (unsafe? could be)
- safer hoist_vars (needs some revamping of scope/mangling)
2012-09-11 13:15:55 +03:00
Mihai Bazon
1579c0fb97
hoist_vars is pretty bad, it seems. cancelled it for now.
2012-09-10 22:40:18 +03:00
Mihai Bazon
a41e6cfabb
more progress on the compressor (WIP)
2012-09-10 16:37:05 +03:00
