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fixing unfoldSoak performance my memoizing. #1033

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This commit is contained in:
Jeremy Ashkenas
2011-04-30 13:13:09 -04:00
parent 468ad1a2d5
commit c51679810a
2 changed files with 44 additions and 34 deletions
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49
lib/nodes.js
View File

@@ -502,29 +502,36 @@
return code;
};
Value.prototype.unfoldSoak = function(o) {
var fst, i, ifn, prop, ref, snd, _len, _ref2;
if (ifn = this.base.unfoldSoak(o)) {
Array.prototype.push.apply(ifn.body.properties, this.properties);
return ifn;
var result;
if (this.unfoldedSoak != null) {
return this.unfoldedSoak;
}
_ref2 = this.properties;
for (i = 0, _len = _ref2.length; i < _len; i++) {
prop = _ref2[i];
if (prop.soak) {
prop.soak = false;
fst = new Value(this.base, this.properties.slice(0, i));
snd = new Value(this.base, this.properties.slice(i));
if (fst.isComplex()) {
ref = new Literal(o.scope.freeVariable('ref'));
fst = new Parens(new Assign(ref, fst));
snd.base = ref;
}
return new If(new Existence(fst), snd, {
soak: true
});
result = __bind(function() {
var fst, i, ifn, prop, ref, snd, _len, _ref2;
if (ifn = this.base.unfoldSoak(o)) {
Array.prototype.push.apply(ifn.body.properties, this.properties);
return ifn;
}
}
return null;
_ref2 = this.properties;
for (i = 0, _len = _ref2.length; i < _len; i++) {
prop = _ref2[i];
if (prop.soak) {
prop.soak = false;
fst = new Value(this.base, this.properties.slice(0, i));
snd = new Value(this.base, this.properties.slice(i));
if (fst.isComplex()) {
ref = new Literal(o.scope.freeVariable('ref'));
fst = new Parens(new Assign(ref, fst));
snd.base = ref;
}
return new If(new Existence(fst), snd, {
soak: true
});
}
}
return null;
}, this)();
return this.unfoldedSoak = result || false;
};
return Value;
})();

29
src/nodes.coffee
View File

@@ -404,19 +404,22 @@ exports.Value = class Value extends Base
# Unfold a soak into an `If`: `a?.b` -> `a.b if a?`
unfoldSoak: (o) ->
if ifn = @base.unfoldSoak o
Array::push.apply ifn.body.properties, @properties
return ifn
for prop, i in @properties when prop.soak
prop.soak = off
fst = new Value @base, @properties.slice 0, i
snd = new Value @base, @properties.slice i
if fst.isComplex()
ref = new Literal o.scope.freeVariable 'ref'
fst = new Parens new Assign ref, fst
snd.base = ref
return new If new Existence(fst), snd, soak: on
null
return @unfoldedSoak if @unfoldedSoak?
result = do =>
if ifn = @base.unfoldSoak o
Array::push.apply ifn.body.properties, @properties
return ifn
for prop, i in @properties when prop.soak
prop.soak = off
fst = new Value @base, @properties.slice 0, i
snd = new Value @base, @properties.slice i
if fst.isComplex()
ref = new Literal o.scope.freeVariable 'ref'
fst = new Parens new Assign ref, fst
snd.base = ref
return new If new Existence(fst), snd, soak: on
null
@unfoldedSoak = result or no
#### Comment