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fix(babel-parser): avoid state.clone() to clone the whole token store (#11029)

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* fix(babel-parser): avoid state.clone() to clone the whole token store

Fixed the performance issue on large input when turned on option {tokens: true} and typescript plugin which uses quite a few state.clone().

* test(babel-parser): turn on 2 typescript tests with tokens:true

The output.json is generated by old master to make sure no regression.

* fix(babel-parser): avoid duplicated tokens trapped by mainly typescript/flow plugins

* test(babel-parser): update output.json to latest master result

* chore(babel-parser): improve performance by storing tokensLength in state
This commit is contained in:
Chunpeng Huo 2020-01-20 14:38:33 +11:00 committed by Huáng Jùnliàng
parent 740064ced7
commit 9bc04baeb5
11 changed files with 1455 additions and 514 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
packages/babel-parser/src/parser/statement.js
View File

@ -67,7 +67,7 @@ export default class StatementParser extends ExpressionParser {
file.program = this.finishNode(program, "Program");
file.comments = this.state.comments;
if (this.options.tokens) file.tokens = this.state.tokens;
if (this.options.tokens) file.tokens = this.tokens;
return this.finishNode(file, "File");
}

16
packages/babel-parser/src/tokenizer/index.js
View File

@ -1,6 +1,7 @@
// @flow
import type { Options } from "../options";
import * as N from "../types";
import type { Position } from "../util/location";
import * as charCodes from "charcodes";
import { isIdentifierStart, isIdentifierChar } from "../util/identifier";
@ -114,6 +115,9 @@ export default class Tokenizer extends LocationParser {
isLookahead: boolean;
// Token store.
tokens: Array<Token | N.Comment> = [];
constructor(options: Options, input: string) {
super();
this.state = new State();
@ -123,13 +127,21 @@ export default class Tokenizer extends LocationParser {
this.isLookahead = false;
}
pushToken(token: Token | N.Comment) {
// Pop out invalid tokens trapped by try-catch parsing.
// Those parsing branches are mainly created by typescript and flow plugins.
this.tokens.length = this.state.tokensLength;
this.tokens.push(token);
++this.state.tokensLength;
}
// Move to the next token
next(): void {
if (!this.isLookahead) {
this.checkKeywordEscapes();
if (this.options.tokens) {
this.state.tokens.push(new Token(this.state));
this.pushToken(new Token(this.state));
}
}
@ -242,7 +254,7 @@ export default class Tokenizer extends LocationParser {
loc: new SourceLocation(startLoc, endLoc),
};
if (this.options.tokens) this.state.tokens.push(comment);
if (this.options.tokens) this.pushToken(comment);
this.state.comments.push(comment);
this.addComment(comment);
}

7
packages/babel-parser/src/tokenizer/state.js
View File

@ -5,7 +5,6 @@ import * as N from "../types";
import { Position } from "../util/location";
import { types as ct, type TokContext } from "./context";
import type { Token } from "./index";
import { types as tt, type TokenType } from "./types";
type TopicContextState = {
@ -93,9 +92,6 @@ export default class State {
yieldPos: number = -1;
awaitPos: number = -1;
// Token store.
tokens: Array<Token | N.Comment> = [];
// Comment store.
comments: Array<N.Comment> = [];
@ -153,6 +149,9 @@ export default class State {
// `export default foo;` and `export { foo as default };`.
exportedIdentifiers: Array<string> = [];
// Tokens length in token store
tokensLength: number = 0;
curPosition(): Position {
return new Position(this.curLine, this.pos - this.lineStart);
}

0
packages/babel-parser/test/fixtures/typescript/arrow-function/async-generic/input.ts → packages/babel-parser/test/fixtures/typescript/arrow-function/async-generic-tokens-true/input.ts vendored
View File

5
packages/babel-parser/test/fixtures/typescript/arrow-function/async-generic-tokens-true/options.json vendored Normal file
View File

@ -0,0 +1,5 @@
{
"sourceType": "module",
"plugins": ["typescript"],
"tokens": true
}

623
packages/babel-parser/test/fixtures/typescript/arrow-function/async-generic-tokens-true/output.json vendored Normal file
View File

@ -0,0 +1,623 @@
{
"type": "File",
"start": 0,
"end": 24,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"column": 24
}
},
"program": {
"type": "Program",
"start": 0,
"end": 24,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"column": 24
}
},
"sourceType": "module",
"interpreter": null,
"body": [
{
"type": "ExpressionStatement",
"start": 0,
"end": 24,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"column": 24
}
},
"expression": {
"type": "ArrowFunctionExpression",
"start": 0,
"end": 23,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"column": 23
}
},
"typeParameters": {
"type": "TSTypeParameterDeclaration",
"start": 6,
"end": 9,
"loc": {
"start": {
"line": 1,
"column": 6
},
"end": {
"line": 1,
"column": 9
}
},
"params": [
{
"type": "TSTypeParameter",
"start": 7,
"end": 8,
"loc": {
"start": {
"line": 1,
"column": 7
},
"end": {
"line": 1,
"column": 8
}
},
"name": "T"
}
]
},
"params": [
{
"type": "Identifier",
"start": 10,
"end": 14,
"loc": {
"start": {
"line": 1,
"column": 10
},
"end": {
"line": 1,
"column": 14
},
"identifierName": "a"
},
"name": "a",
"typeAnnotation": {
"type": "TSTypeAnnotation",
"start": 11,
"end": 14,
"loc": {
"start": {
"line": 1,
"column": 11
},
"end": {
"line": 1,
"column": 14
}
},
"typeAnnotation": {
"type": "TSTypeReference",
"start": 13,
"end": 14,
"loc": {
"start": {
"line": 1,
"column": 13
},
"end": {
"line": 1,
"column": 14
}
},
"typeName": {
"type": "Identifier",
"start": 13,
"end": 14,
"loc": {
"start": {
"line": 1,
"column": 13
},
"end": {
"line": 1,
"column": 14
},
"identifierName": "T"
},
"name": "T"
}
}
}
}
],
"returnType": {
"type": "TSTypeAnnotation",
"start": 15,
"end": 18,
"loc": {
"start": {
"line": 1,
"column": 15
},
"end": {
"line": 1,
"column": 18
}
},
"typeAnnotation": {
"type": "TSTypeReference",
"start": 17,
"end": 18,
"loc": {
"start": {
"line": 1,
"column": 17
},
"end": {
"line": 1,
"column": 18
}
},
"typeName": {
"type": "Identifier",
"start": 17,
"end": 18,
"loc": {
"start": {
"line": 1,
"column": 17
},
"end": {
"line": 1,
"column": 18
},
"identifierName": "T"
},
"name": "T"
}
}
},
"id": null,
"generator": false,
"async": true,
"body": {
"type": "Identifier",
"start": 22,
"end": 23,
"loc": {
"start": {
"line": 1,
"column": 22
},
"end": {
"line": 1,
"column": 23
},
"identifierName": "a"
},
"name": "a"
}
}
}
],
"directives": []
},
"tokens": [
{
"type": {
"label": "name",
"beforeExpr": false,
"startsExpr": true,
"rightAssociative": false,
"isLoop": false,
"isAssign": false,
"prefix": false,
"postfix": false,
"binop": null
},
"value": "async",
"start": 0,
"end": 5,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"column": 5
}
}
},
{
"type": {
"label": "</>/<=/>=",
"beforeExpr": true,
"startsExpr": false,
"rightAssociative": false,
"isLoop": false,
"isAssign": false,
"prefix": false,
"postfix": false,
"binop": 7,
"updateContext": null
},
"value": "<",
"start": 6,
"end": 7,
"loc": {
"start": {
"line": 1,
"column": 6
},
"end": {
"line": 1,
"column": 7
}
}
},
{
"type": {
"label": "name",
"beforeExpr": false,
"startsExpr": true,
"rightAssociative": false,
"isLoop": false,
"isAssign": false,
"prefix": false,
"postfix": false,
"binop": null
},
"value": "T",
"start": 7,
"end": 8,
"loc": {
"start": {
"line": 1,
"column": 7
},
"end": {
"line": 1,
"column": 8
}
}
},
{
"type": {
"label": "</>/<=/>=",
"beforeExpr": true,
"startsExpr": false,
"rightAssociative": false,
"isLoop": false,
"isAssign": false,
"prefix": false,
"postfix": false,
"binop": 7,
"updateContext": null
},
"value": ">",
"start": 8,
"end": 9,
"loc": {
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"column": 8
},
"end": {
"line": 1,
"column": 9
}
}
},
{
"type": {
"label": "(",
"beforeExpr": true,
"startsExpr": true,
"rightAssociative": false,
"isLoop": false,
"isAssign": false,
"prefix": false,
"postfix": false,
"binop": null
},
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"loc": {
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},
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}
}
},
{
"type": {
"label": "name",
"beforeExpr": false,
"startsExpr": true,
"rightAssociative": false,
"isLoop": false,
"isAssign": false,
"prefix": false,
"postfix": false,
"binop": null
},
"value": "a",
"start": 10,
"end": 11,
"loc": {
"start": {
"line": 1,
"column": 10
},
"end": {
"line": 1,
"column": 11
}
}
},
{
"type": {
"label": ":",
"beforeExpr": true,
"startsExpr": false,
"rightAssociative": false,
"isLoop": false,
"isAssign": false,
"prefix": false,
"postfix": false,
"binop": null,
"updateContext": null
},
"start": 11,
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"loc": {
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},
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}
}
},
{
"type": {
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"beforeExpr": false,
"startsExpr": true,
"rightAssociative": false,
"isLoop": false,
"isAssign": false,
"prefix": false,
"postfix": false,
"binop": null
},
"value": "T",
"start": 13,
"end": 14,
"loc": {
"start": {
"line": 1,
"column": 13
},
"end": {
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"column": 14
}
}
},
{
"type": {
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"startsExpr": false,
"rightAssociative": false,
"isLoop": false,
"isAssign": false,
"prefix": false,
"postfix": false,
"binop": null
},
"start": 14,
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"loc": {
"start": {
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"column": 14
},
"end": {
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"column": 15
}
}
},
{
"type": {
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"beforeExpr": true,
"startsExpr": false,
"rightAssociative": false,
"isLoop": false,
"isAssign": false,
"prefix": false,
"postfix": false,
"binop": null,
"updateContext": null
},
"start": 15,
"end": 16,
"loc": {
"start": {
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"column": 15
},
"end": {
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"column": 16
}
}
},
{
"type": {
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"startsExpr": true,
"rightAssociative": false,
"isLoop": false,
"isAssign": false,
"prefix": false,
"postfix": false,
"binop": null
},
"value": "T",
"start": 17,
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"loc": {
"start": {
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"column": 17
},
"end": {
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}
}
},
{
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}
}
},
{
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"beforeExpr": false,
"startsExpr": true,
"rightAssociative": false,
"isLoop": false,
"isAssign": false,
"prefix": false,
"postfix": false,
"binop": null
},
"value": "a",
"start": 22,
"end": 23,
"loc": {
"start": {
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"column": 22
},
"end": {
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"column": 23
}
}
},
{
"type": {
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"beforeExpr": true,
"startsExpr": false,
"rightAssociative": false,
"isLoop": false,
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"prefix": false,
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}
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},
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"end": {
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}
}
}
]
}

231
packages/babel-parser/test/fixtures/typescript/arrow-function/async-generic/output.json vendored
View File

@ -1,231 +0,0 @@
{
"type": "File",
"start": 0,
"end": 24,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"column": 24
}
},
"program": {
"type": "Program",
"start": 0,
"end": 24,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"column": 24
}
},
"sourceType": "module",
"interpreter": null,
"body": [
{
"type": "ExpressionStatement",
"start": 0,
"end": 24,
"loc": {
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"column": 0
},
"end": {
"line": 1,
"column": 24
}
},
"expression": {
"type": "ArrowFunctionExpression",
"start": 0,
"end": 23,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
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"column": 23
}
},
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"start": 6,
"end": 9,
"loc": {
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},
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}
},
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}
},
"name": "T"
}
]
},
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{
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},
"identifierName": "a"
},
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"end": 14,
"loc": {
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},
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}
},
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"start": 13,
"end": 14,
"loc": {
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"column": 13
},
"end": {
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"column": 14
}
},
"typeName": {
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"start": 13,
"end": 14,
"loc": {
"start": {
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"column": 13
},
"end": {
"line": 1,
"column": 14
},
"identifierName": "T"
},
"name": "T"
}
}
}
}
],
"returnType": {
"type": "TSTypeAnnotation",
"start": 15,
"end": 18,
"loc": {
"start": {
"line": 1,
"column": 15
},
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"column": 18
}
},
"typeAnnotation": {
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"start": 17,
"end": 18,
"loc": {
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},
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"line": 1,
"column": 18
}
},
"typeName": {
"type": "Identifier",
"start": 17,
"end": 18,
"loc": {
"start": {
"line": 1,
"column": 17
},
"end": {
"line": 1,
"column": 18
},
"identifierName": "T"
},
"name": "T"
}
}
},
"id": null,
"generator": false,
"async": true,
"body": {
"type": "Identifier",
"start": 22,
"end": 23,
"loc": {
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"column": 22
},
"end": {
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"column": 23
},
"identifierName": "a"
},
"name": "a"
}
}
}
],
"directives": []
}
}

0
packages/babel-parser/test/fixtures/typescript/type-alias/generic-complex/input.ts → packages/babel-parser/test/fixtures/typescript/type-alias/generic-complex-tokens-true/input.ts vendored
View File

5
packages/babel-parser/test/fixtures/typescript/type-alias/generic-complex-tokens-true/options.json vendored Normal file
View File

@ -0,0 +1,5 @@
{
"sourceType": "module",
"plugins": ["typescript"],
"tokens": true
}

804
packages/babel-parser/test/fixtures/typescript/type-alias/generic-complex-tokens-true/output.json vendored Normal file
View File

@ -0,0 +1,804 @@
{
"type": "File",
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"end": 52,
"loc": {
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}
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}
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}
}
]
},
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},
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"loc": {
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},
"params": [
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276
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