cerxes/babel
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perf: Move input to state and precalculate length

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This also fixes a bug with async functions
This commit is contained in:
Daniel Tschinder
2019-01-15 12:45:36 -08:00
parent ae154c86ed
commit 2dc1c91955
12 changed files with 160 additions and 126 deletions
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20
packages/babel-parser/src/plugins/flow.js
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@@ -1124,7 +1124,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
node.types = [];
this.expect(tt.bracketL);
// We allow trailing commas
while (this.state.pos < this.input.length && !this.match(tt.bracketR)) {
while (this.state.pos < this.state.length && !this.match(tt.bracketR)) {
node.types.push(this.flowParseType());
if (this.match(tt.bracketR)) break;
this.expect(tt.comma);
@@ -1934,7 +1934,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
// ensure that inside flow types, we bypass the jsx parser plugin
readToken(code: number): void {
const next = this.input.charCodeAt(this.state.pos + 1);
const next = this.state.input.charCodeAt(this.state.pos + 1);
if (
this.state.inType &&
(code === charCodes.greaterThan || code === charCodes.lessThan)
@@ -2686,7 +2686,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
}
readToken_mult_modulo(code: number): void {
const next = this.input.charCodeAt(this.state.pos + 1);
const next = this.state.input.charCodeAt(this.state.pos + 1);
if (
code === charCodes.asterisk &&
next === charCodes.slash &&
@@ -2728,7 +2728,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
}
if (this.hasPlugin("flow") && this.state.hasFlowComment) {
const end = this.input.indexOf("*-/", (this.state.pos += 2));
const end = this.state.input.indexOf("*-/", (this.state.pos += 2));
if (end === -1) this.raise(this.state.pos - 2, "Unterminated comment");
this.state.pos = end + 3;
return;
@@ -2742,20 +2742,22 @@ export default (superClass: Class<Parser>): Class<Parser> =>
let shiftToFirstNonWhiteSpace = 2;
while (
[charCodes.space, charCodes.tab].includes(
this.input.charCodeAt(pos + shiftToFirstNonWhiteSpace),
this.state.input.charCodeAt(pos + shiftToFirstNonWhiteSpace),
)
) {
shiftToFirstNonWhiteSpace++;
}
const ch2 = this.input.charCodeAt(shiftToFirstNonWhiteSpace + pos);
const ch3 = this.input.charCodeAt(shiftToFirstNonWhiteSpace + pos + 1);
const ch2 = this.state.input.charCodeAt(shiftToFirstNonWhiteSpace + pos);
const ch3 = this.state.input.charCodeAt(
shiftToFirstNonWhiteSpace + pos + 1,
);
if (ch2 === charCodes.colon && ch3 === charCodes.colon) {
return shiftToFirstNonWhiteSpace + 2; // check for /*::
}
if (
this.input.slice(
this.state.input.slice(
shiftToFirstNonWhiteSpace + pos,
shiftToFirstNonWhiteSpace + pos + 12,
) === "flow-include"
@@ -2769,7 +2771,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
}
hasFlowCommentCompletion(): void {
const end = this.input.indexOf("*/", this.state.pos);
const end = this.state.input.indexOf("*/", this.state.pos);
if (end === -1) {
this.raise(this.state.pos, "Unterminated comment");
}