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Minimize memory allocation in scriptlet helper `proxy-apply-fn` 

Probably beneficial in cases of proxied method called in a tight
loop.

Additionally, added `throwFunc` as valid constant in script helper
`validate-constant.fn`. Does what the name implies.
This commit is contained in:
Raymond Hill 2024-09-19 07:49:54 -04:00
parent e98fdeb0a5
commit 4ccc0d0fda
No known key found for this signature in database
GPG Key ID: 25E1490B761470C2
1 changed files with 34 additions and 6 deletions
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40
assets/resources/scriptlets.js
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@ -535,6 +535,8 @@ function validateConstantFn(trusted, raw, extraArgs = {}) {
value = function(){ return true; };
} else if ( raw === 'falseFunc' ) {
value = function(){ return false; };
} else if ( raw === 'throwFunc' ) {
value = function(){ throw ''; };
} else if ( /^-?\d+$/.test(raw) ) {
value = parseInt(raw);
if ( isNaN(raw) ) { return; }
@ -1498,23 +1500,49 @@ function proxyApplyFn(
const fn = context[prop];
if ( typeof fn !== 'function' ) { return; }
if ( proxyApplyFn.CtorContext === undefined ) {
proxyApplyFn.ctorContexts = [];
proxyApplyFn.CtorContext = class {
constructor(callFn, callArgs) {
constructor(...args) {
this.init(...args);
}
init(callFn, callArgs) {
this.callFn = callFn;
this.callArgs = callArgs;
return this;
}
reflect() {
return Reflect.construct(this.callFn, this.callArgs);
const r = Reflect.construct(this.callFn, this.callArgs);
this.callFn = this.callArgs = undefined;
proxyApplyFn.ctorContexts.push(this);
return r;
}
static factory(...args) {
return proxyApplyFn.ctorContexts.length !== 0
? proxyApplyFn.ctorContexts.pop().init(...args)
: new proxyApplyFn.CtorContext(...args);
}
};
proxyApplyFn.applyContexts = [];
proxyApplyFn.ApplyContext = class {
constructor(callFn, thisArg, callArgs) {
constructor(...args) {
this.init(...args);
}
init(callFn, thisArg, callArgs) {
this.callFn = callFn;
this.thisArg = thisArg;
this.callArgs = callArgs;
return this;
}
reflect() {
return Reflect.apply(this.callFn, this.thisArg, this.callArgs);
const r = Reflect.apply(this.callFn, this.thisArg, this.callArgs);
this.callFn = this.thisArg = this.callArgs = undefined;
proxyApplyFn.applyContexts.push(this);
return r;
}
static factory(...args) {
return proxyApplyFn.applyContexts.length !== 0
? proxyApplyFn.applyContexts.pop().init(...args)
: new proxyApplyFn.ApplyContext(...args);
}
};
}
@ -1522,7 +1550,7 @@ function proxyApplyFn(
const toString = (function toString() { return fnStr; }).bind(null);
const proxyDetails = {
apply(target, thisArg, args) {
return handler(new proxyApplyFn.ApplyContext(target, thisArg, args));
return handler(proxyApplyFn.ApplyContext.factory(target, thisArg, args));
},
get(target, prop) {
if ( prop === 'toString' ) { return toString; }
@ -1531,7 +1559,7 @@ function proxyApplyFn(
};
if ( fn.prototype?.constructor === fn ) {
proxyDetails.construct = function(target, args) {
return handler(new proxyApplyFn.CtorContext(target, args));
return handler(proxyApplyFn.CtorContext.factory(target, args));
};
}
context[prop] = new Proxy(fn, proxyDetails);