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improve Dictionary performance (#5202)

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- workaround `__proto__` quirks on v8
This commit is contained in:
Alex Lam S.L
2021-12-05 06:58:52 +00:00
committed by GitHub
parent 860aa9531b
commit b0799105c2
8 changed files with 255 additions and 221 deletions
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74
lib/utils.js
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@@ -96,15 +96,6 @@ function defaults(args, defs, croak) {
return defs;
}
function merge(obj, ext) {
var count = 0;
for (var i in ext) if (HOP(ext, i)) {
obj[i] = ext[i];
count++;
}
return count;
}
function noop() {}
function return_false() { return false; }
function return_true() { return true; }
@@ -171,63 +162,80 @@ function all(array, predicate) {
}
function Dictionary() {
this._values = Object.create(null);
this._size = 0;
this.values = Object.create(null);
}
Dictionary.prototype = {
set: function(key, val) {
if (!this.has(key)) ++this._size;
this._values["$" + key] = val;
if (key == "__proto__") {
this.proto_value = val;
} else {
this.values[key] = val;
}
return this;
},
add: function(key, val) {
if (this.has(key)) {
this.get(key).push(val);
var list = this.get(key);
if (list) {
list.push(val);
} else {
this.set(key, [ val ]);
}
return this;
},
get: function(key) { return this._values["$" + key] },
get: function(key) {
return key == "__proto__" ? this.proto_value : this.values[key];
},
del: function(key) {
if (this.has(key)) {
--this._size;
delete this._values["$" + key];
if (key == "__proto__") {
delete this.proto_value;
} else {
delete this.values[key];
}
return this;
},
has: function(key) { return ("$" + key) in this._values },
has: function(key) {
return key == "__proto__" ? "proto_value" in this : key in this.values;
},
all: function(predicate) {
for (var i in this._values)
if (!predicate(this._values[i], i.substr(1)))
return false;
for (var i in this.values)
if (!predicate(this.values[i], i)) return false;
if ("proto_value" in this && !predicate(this.proto_value, "__proto__")) return false;
return true;
},
each: function(f) {
for (var i in this._values)
f(this._values[i], i.substr(1));
for (var i in this.values)
f(this.values[i], i);
if ("proto_value" in this) f(this.proto_value, "__proto__");
},
size: function() {
return this._size;
return Object.keys(this.values).length + ("proto_value" in this);
},
map: function(f) {
var ret = [];
for (var i in this._values)
ret.push(f(this._values[i], i.substr(1)));
for (var i in this.values)
ret.push(f(this.values[i], i));
if ("proto_value" in this) ret.push(f(this.proto_value, "__proto__"));
return ret;
},
clone: function() {
var ret = new Dictionary();
for (var i in this._values)
ret._values[i] = this._values[i];
ret._size = this._size;
this.each(function(value, i) {
ret.set(i, value);
});
return ret;
},
toObject: function() { return this._values }
toObject: function() {
var obj = {};
this.each(function(value, i) {
obj["$" + i] = value;
});
return obj;
},
};
Dictionary.fromObject = function(obj) {
var dict = new Dictionary();
dict._size = merge(dict._values, obj);
for (var i in obj)
if (HOP(obj, i)) dict.set(i.slice(1), obj[i]);
return dict;
};