feat(es/minifier): Drop new token if possible (#4932)

swc-project · Jun 11, 2022 · 5940894 · 5940894 · github-actions · Jun 11, 2022
1 parent 565f06f
commit 5940894
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Showing 106 changed files with 1,024 additions and 951 deletions.
diff --git a/crates/swc/tests/tsc-references/ES5For-of37_es2015.2.minified.js b/crates/swc/tests/tsc-references/ES5For-of37_es2015.2.minified.js
@@ -9,7 +9,7 @@ for (const i of [
         1,
         2,
         3
-    ])if (2 === i) throw new Error('ERR');
+    ])if (2 === i) throw Error('ERR');
     console.log(i);
 } catch (err) {
     console.log('E %s %s', i, err);

diff --git a/crates/swc/tests/tsc-references/ES5For-of37_es5.2.minified.js b/crates/swc/tests/tsc-references/ES5For-of37_es5.2.minified.js
@@ -15,7 +15,7 @@ try {
                     1,
                     2,
                     3
-                ][Symbol.iterator](); !(_iteratorNormalCompletion1 = (_step1 = _iterator1.next()).done); _iteratorNormalCompletion1 = !0)if (_step1.value, 2 === i) throw new Error("ERR");
+                ][Symbol.iterator](); !(_iteratorNormalCompletion1 = (_step1 = _iterator1.next()).done); _iteratorNormalCompletion1 = !0)if (_step1.value, 2 === i) throw Error("ERR");
             } catch (err) {
                 _didIteratorError1 = !0, _iteratorError1 = err;
             } finally{

diff --git a/...rences/ExportVariableOfGenericTypeWithInaccessibleTypeAsTypeArgument_es2015.2.minified.js b/...rences/ExportVariableOfGenericTypeWithInaccessibleTypeAsTypeArgument_es2015.2.minified.js
@@ -1,5 +1,5 @@
 var A;
 !function(A1) {
     var beez;
-    A1.beez2 = new Array(), A1.beez = beez;
+    A1.beez2 = Array(), A1.beez = beez;
 }(A || (A = {}));
diff --git a/...eferences/ExportVariableOfGenericTypeWithInaccessibleTypeAsTypeArgument_es5.2.minified.js b/...eferences/ExportVariableOfGenericTypeWithInaccessibleTypeAsTypeArgument_es5.2.minified.js
@@ -5,5 +5,5 @@ import _class_call_check from "@swc/helpers/lib/_class_call_check.js";
         "use strict";
         _class_call_check(this, B);
     };
-    A1.beez2 = new Array(), A1.beez = beez;
+    A1.beez2 = Array(), A1.beez = beez;
 }(A || (A = {}));
diff --git a/crates/swc/tests/tsc-references/arrayLiteral_es2015.2.minified.js b/crates/swc/tests/tsc-references/arrayLiteral_es2015.2.minified.js
diff --git a/crates/swc/tests/tsc-references/arrayLiteral_es5.2.minified.js b/crates/swc/tests/tsc-references/arrayLiteral_es5.2.minified.js
diff --git a/crates/swc/tests/tsc-references/classCanExtendConstructorFunction_es2015.2.minified.js b/crates/swc/tests/tsc-references/classCanExtendConstructorFunction_es2015.2.minified.js
@@ -8,7 +8,7 @@ Wagon.circle = function(wagons) {
 };
 var db = new class extends Wagon {
     load(files, format) {
-        if ("xmlolololol" === format) throw new Error("please do not use XML. It was a joke.");
+        if ("xmlolololol" === format) throw Error("please do not use XML. It was a joke.");
         super.speed(), super.weight();
     }
     constructor(){

diff --git a/crates/swc/tests/tsc-references/classCanExtendConstructorFunction_es5.2.minified.js b/crates/swc/tests/tsc-references/classCanExtendConstructorFunction_es5.2.minified.js
@@ -22,7 +22,7 @@ var Sql = function(Wagon1) {
         return _class_call_check(this, Sql), (_this = _super.call(this)).foonly = 12, _this;
     }
     return Sql.prototype.load = function(files, format) {
-        if ("xmlolololol" === format) throw new Error("please do not use XML. It was a joke.");
+        if ("xmlolololol" === format) throw Error("please do not use XML. It was a joke.");
         _get(_get_prototype_of(Sql.prototype), "speed", this).call(this), _get(_get_prototype_of(Sql.prototype), "weight", this).call(this);
     }, Sql;
 }(Wagon), db = new Sql();

diff --git a/crates/swc/tests/tsc-references/controlFlowIIFE_es2015.2.minified.js b/crates/swc/tests/tsc-references/controlFlowIIFE_es2015.2.minified.js
@@ -2,5 +2,5 @@ import _async_to_generator from "@swc/helpers/lib/_async_to_generator.js";
 let maybeNumber;
 maybeNumber = 1, ++maybeNumber, maybeNumber++;
 let test;
-if (!test) throw new Error('Test is not defined');
+if (!test) throw Error('Test is not defined');
 test.slice(1);
diff --git a/crates/swc/tests/tsc-references/controlFlowIIFE_es5.2.minified.js b/crates/swc/tests/tsc-references/controlFlowIIFE_es5.2.minified.js
@@ -1,5 +1,5 @@
 var maybeNumber, test;
 import _async_to_generator from "@swc/helpers/lib/_async_to_generator.js";
 import regeneratorRuntime from "regenerator-runtime";
-if (maybeNumber = 1, ++maybeNumber, maybeNumber++, !test) throw new Error("Test is not defined");
+if (maybeNumber = 1, ++maybeNumber, maybeNumber++, !test) throw Error("Test is not defined");
 test.slice(1);
diff --git a/crates/swc/tests/tsc-references/discriminatedUnionTypes2_es2015.2.minified.js b/crates/swc/tests/tsc-references/discriminatedUnionTypes2_es2015.2.minified.js
@@ -4,5 +4,5 @@ function f15(x) {
 f15({
     value: 10
 }), f15({
-    error: new Error("boom")
+    error: Error("boom")
 });
diff --git a/crates/swc/tests/tsc-references/discriminatedUnionTypes2_es5.2.minified.js b/crates/swc/tests/tsc-references/discriminatedUnionTypes2_es5.2.minified.js
@@ -4,5 +4,5 @@ function f15(x) {
 f15({
     value: 10
 }), f15({
-    error: new Error("boom")
+    error: Error("boom")
 });
diff --git a/crates/swc/tests/tsc-references/exportSpellingSuggestion_es2015.2.minified.js b/crates/swc/tests/tsc-references/exportSpellingSuggestion_es2015.2.minified.js
@@ -1,3 +1,3 @@
 export function assertNever(x, msg) {
-    throw new Error("Unexpected " + msg);
+    throw Error("Unexpected " + msg);
 }
diff --git a/crates/swc/tests/tsc-references/exportSpellingSuggestion_es5.2.minified.js b/crates/swc/tests/tsc-references/exportSpellingSuggestion_es5.2.minified.js
@@ -1,3 +1,3 @@
 export function assertNever(x, msg) {
-    throw new Error("Unexpected " + msg);
+    throw Error("Unexpected " + msg);
 }
diff --git a/crates/swc/tests/tsc-references/fixSignatureCaching_es2015.2.minified.js b/crates/swc/tests/tsc-references/fixSignatureCaching_es2015.2.minified.js
diff --git a/crates/swc/tests/tsc-references/fixSignatureCaching_es5.2.minified.js b/crates/swc/tests/tsc-references/fixSignatureCaching_es5.2.minified.js
diff --git a/crates/swc/tests/tsc-references/functionConstraintSatisfaction2_es2015.2.minified.js b/crates/swc/tests/tsc-references/functionConstraintSatisfaction2_es2015.2.minified.js
@@ -1,3 +1,3 @@
 !function(x) {
     return x;
-}(()=>{}, 1), new Function();
+}(()=>{}, 1), Function();
diff --git a/crates/swc/tests/tsc-references/functionConstraintSatisfaction2_es5.2.minified.js b/crates/swc/tests/tsc-references/functionConstraintSatisfaction2_es5.2.minified.js
@@ -9,4 +9,4 @@ var C = function() {
     "use strict";
     _class_call_check(this, C2);
 };
-new Function();
+Function();
diff --git a/crates/swc/tests/tsc-references/functionConstraintSatisfaction_es2015.2.minified.js b/crates/swc/tests/tsc-references/functionConstraintSatisfaction_es2015.2.minified.js
@@ -1 +1 @@
-new Function();
+Function();
diff --git a/crates/swc/tests/tsc-references/functionConstraintSatisfaction_es5.2.minified.js b/crates/swc/tests/tsc-references/functionConstraintSatisfaction_es5.2.minified.js
@@ -3,7 +3,7 @@ var C = function() {
     "use strict";
     _class_call_check(this, C);
 };
-new Function();
+Function();
 var C2 = function() {
     "use strict";
     _class_call_check(this, C2);

diff --git a/crates/swc/tests/tsc-references/jsDeclarationsFunctionLikeClasses2_es2015.2.minified.js b/crates/swc/tests/tsc-references/jsDeclarationsFunctionLikeClasses2_es2015.2.minified.js
@@ -1,9 +1,9 @@
 export function Vec(len) {
-    this.storage = new Array(len);
+    this.storage = Array(len);
 }
 Vec.prototype = {
     dot (other) {
-        if (other.storage.length !== this.storage.length) throw new Error("Dot product only applicable for vectors of equal length");
+        if (other.storage.length !== this.storage.length) throw Error("Dot product only applicable for vectors of equal length");
         let sum = 0;
         for(let i = 0; i < this.storage.length; i++)sum += this.storage[i] * other.storage[i];
         return sum;

diff --git a/crates/swc/tests/tsc-references/jsDeclarationsFunctionLikeClasses2_es5.2.minified.js b/crates/swc/tests/tsc-references/jsDeclarationsFunctionLikeClasses2_es5.2.minified.js
@@ -1,10 +1,10 @@
 import _instanceof from "@swc/helpers/lib/_instanceof.js";
 export function Vec(len) {
-    this.storage = new Array(len);
+    this.storage = Array(len);
 }
 Vec.prototype = {
     dot: function(other) {
-        if (other.storage.length !== this.storage.length) throw new Error("Dot product only applicable for vectors of equal length");
+        if (other.storage.length !== this.storage.length) throw Error("Dot product only applicable for vectors of equal length");
         for(var sum = 0, i = 0; i < this.storage.length; i++)sum += this.storage[i] * other.storage[i];
         return sum;
     },

diff --git a/crates/swc/tests/tsc-references/neverReturningFunctions1_es5.2.minified.js b/crates/swc/tests/tsc-references/neverReturningFunctions1_es5.2.minified.js
@@ -10,7 +10,7 @@ var Test = function() {
     }
     var _proto = Test.prototype;
     return _proto.fail = function(message) {
-        throw new Error(message);
+        throw Error(message);
     }, _proto.f1 = function(x) {
         void 0 === x && this.fail("undefined argument"), x.length;
     }, _proto.f2 = function(x) {
@@ -53,7 +53,7 @@ var MyThrowable = function() {
         _class_call_check(this, MyThrowable);
     }
     return MyThrowable.prototype.throw = function() {
-        throw new Error();
+        throw Error();
     }, MyThrowable;
 }(), SuperThrowable = function(MyThrowable) {
     "use strict";

diff --git a/crates/swc/tests/tsc-references/neverType_es2015.2.minified.js b/crates/swc/tests/tsc-references/neverType_es2015.2.minified.js
@@ -1,5 +1,5 @@
 function error(message) {
-    throw new Error(message);
+    throw Error(message);
 }
 (function(cb) {
     cb();
@@ -8,7 +8,7 @@ function error(message) {
 }(()=>error("Something failed")), function(cb) {
     cb();
 }(()=>{
-    throw new Error();
+    throw Error();
 }), function(cb) {
     cb();
 }(()=>error("Error callback"));
diff --git a/crates/swc/tests/tsc-references/neverType_es5.2.minified.js b/crates/swc/tests/tsc-references/neverType_es5.2.minified.js
@@ -1,6 +1,6 @@
 import _class_call_check from "@swc/helpers/lib/_class_call_check.js";
 function error(message) {
-    throw new Error(message);
+    throw Error(message);
 }
 var C = function() {
     "use strict";
@@ -9,11 +9,11 @@ var C = function() {
     }
     var _proto = C.prototype;
     return _proto.void1 = function() {
-        throw new Error();
+        throw Error();
     }, _proto.void2 = function() {
         for(;;);
     }, _proto.never1 = function() {
-        throw new Error();
+        throw Error();
     }, _proto.never2 = function() {
         for(;;);
     }, C;
@@ -29,7 +29,7 @@ var C = function() {
 }), function(cb) {
     cb();
 }(function() {
-    throw new Error();
+    throw Error();
 }), function(cb) {
     cb();
 }(function() {

diff --git a/crates/swc/tests/tsc-references/parser15.4.4.14-9-2_es2015.2.minified.js b/crates/swc/tests/tsc-references/parser15.4.4.14-9-2_es2015.2.minified.js
@@ -1,5 +1,5 @@
 runTestCase(function() {
-    var a = new Array(!1, void 0, null, "0", {
+    var a = Array(!1, void 0, null, "0", {
         toString: function() {
             return 0;
         }

diff --git a/crates/swc/tests/tsc-references/parser15.4.4.14-9-2_es5.2.minified.js b/crates/swc/tests/tsc-references/parser15.4.4.14-9-2_es5.2.minified.js
@@ -1,5 +1,5 @@
 runTestCase(function() {
-    var a = new Array(!1, void 0, null, "0", {
+    var a = Array(!1, void 0, null, "0", {
         toString: function() {
             return 0;
         }

diff --git a/crates/swc/tests/tsc-references/parserObjectCreation1_es2015.2.minified.js b/crates/swc/tests/tsc-references/parserObjectCreation1_es2015.2.minified.js
diff --git a/crates/swc/tests/tsc-references/parserObjectCreation1_es5.2.minified.js b/crates/swc/tests/tsc-references/parserObjectCreation1_es5.2.minified.js
Benchmark suite	Current: `5940894`	Previous: `b041f29`	Ratio
`es/full/minify/libraries/antd`	`1676662222` ns/iter (`± 60331285`)	`1801856233` ns/iter (`± 67535184`)	`0.93`
`es/full/minify/libraries/d3`	`414726747` ns/iter (`± 12893612`)	`449663924` ns/iter (`± 3775355`)	`0.92`
`es/full/minify/libraries/echarts`	`2094202284` ns/iter (`± 21275825`)	`2319792247` ns/iter (`± 44284565`)	`0.90`
`es/full/minify/libraries/jquery`	`89699402` ns/iter (`± 655131`)	`98193511` ns/iter (`± 2413158`)	`0.91`
`es/full/minify/libraries/lodash`	`127431103` ns/iter (`± 1441904`)	`135908126` ns/iter (`± 1407229`)	`0.94`
`es/full/minify/libraries/moment`	`52566742` ns/iter (`± 190958`)	`57053307` ns/iter (`± 1174923`)	`0.92`
`es/full/minify/libraries/react`	`17291269` ns/iter (`± 70553`)	`18215146` ns/iter (`± 358057`)	`0.95`
`es/full/minify/libraries/terser`	`428031610` ns/iter (`± 8306546`)	`504202583` ns/iter (`± 8284465`)	`0.85`
`es/full/minify/libraries/three`	`521521700` ns/iter (`± 13682508`)	`624186581` ns/iter (`± 23548179`)	`0.84`
`es/full/minify/libraries/typescript`	`3924215095` ns/iter (`± 13891072`)	`4262301967` ns/iter (`± 25221516`)	`0.92`
`es/full/minify/libraries/victory`	`693154806` ns/iter (`± 22106244`)	`762201324` ns/iter (`± 15040280`)	`0.91`
`es/full/minify/libraries/vue`	`140171552` ns/iter (`± 2706907`)	`148445357` ns/iter (`± 1762410`)	`0.94`
`es/full/codegen/es3`	`34501` ns/iter (`± 281`)	`36204` ns/iter (`± 1580`)	`0.95`
`es/full/codegen/es5`	`34428` ns/iter (`± 177`)	`35508` ns/iter (`± 1234`)	`0.97`
`es/full/codegen/es2015`	`34495` ns/iter (`± 173`)	`34715` ns/iter (`± 1428`)	`0.99`
`es/full/codegen/es2016`	`34511` ns/iter (`± 174`)	`34082` ns/iter (`± 1371`)	`1.01`
`es/full/codegen/es2017`	`34502` ns/iter (`± 171`)	`34651` ns/iter (`± 1586`)	`1.00`
`es/full/codegen/es2018`	`34467` ns/iter (`± 209`)	`35408` ns/iter (`± 1679`)	`0.97`
`es/full/codegen/es2019`	`34484` ns/iter (`± 150`)	`34974` ns/iter (`± 1303`)	`0.99`
`es/full/codegen/es2020`	`34442` ns/iter (`± 159`)	`34432` ns/iter (`± 1374`)	`1.00`
`es/full/all/es3`	`192990777` ns/iter (`± 1032950`)	`208220769` ns/iter (`± 3963579`)	`0.93`
`es/full/all/es5`	`181635090` ns/iter (`± 937729`)	`197687643` ns/iter (`± 4165791`)	`0.92`
`es/full/all/es2015`	`145088478` ns/iter (`± 922859`)	`158034904` ns/iter (`± 3878207`)	`0.92`
`es/full/all/es2016`	`143935174` ns/iter (`± 1148431`)	`156554170` ns/iter (`± 3243915`)	`0.92`
`es/full/all/es2017`	`143742248` ns/iter (`± 960747`)	`153853669` ns/iter (`± 3870914`)	`0.93`
`es/full/all/es2018`	`141956883` ns/iter (`± 1036337`)	`152434401` ns/iter (`± 4092637`)	`0.93`
`es/full/all/es2019`	`140383230` ns/iter (`± 819181`)	`151666129` ns/iter (`± 3539084`)	`0.93`
`es/full/all/es2020`	`136467606` ns/iter (`± 1111032`)	`146675726` ns/iter (`± 3248459`)	`0.93`
`es/full/parser`	`583926` ns/iter (`± 54544`)	`607017` ns/iter (`± 55977`)	`0.96`
`es/full/base/fixer`	`27914` ns/iter (`± 185`)	`29157` ns/iter (`± 1279`)	`0.96`
`es/full/base/resolver_and_hygiene`	`140415` ns/iter (`± 1650`)	`143821` ns/iter (`± 7008`)	`0.98`
`serialization of ast node`	`181` ns/iter (`± 1`)	`185` ns/iter (`± 6`)	`0.98`
`serialization of serde`	`181` ns/iter (`± 0`)	`192` ns/iter (`± 7`)	`0.94`