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perf(napi/parser, linter/plugins): raw transfer use String.fromCharCode in string decoding (#21018)

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Small optimization to raw transfer string deserialization. Use `String.fromCharCode`instead of `String.fromCodePoint`. [Benchmarking](https://github.com/overlookmotel/oxc-raw-str-bench) showed it's slightly faster, as it's simpler - doesn't need to handle astral code points.
This commit is contained in:
overlookmotel committed 2026-04-03 22:05:20 +00:00
1 parent ac39e5158d
commit 9f494c3bc8
10 files changed
+20 -20
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apps/oxlint/src-js/generated/deserialize.js
+2 -2
View File
@@ -16,7 +16,7 @@ let uint8,
const textDecoder = new TextDecoder("utf-8", { ignoreBOM: true }),
decodeStr = textDecoder.decode.bind(textDecoder),
{ fromCodePoint } = String,
{ fromCharCode } = String,
NodeProto = Object.create(Object.prototype, {
loc: {
get() {
@@ -5894,7 +5894,7 @@ function deserializeStr(pos) {
c;
do {
c = uint8[pos++];
if (c < 128) out += fromCodePoint(c);
if (c < 128) out += fromCharCode(c);
else {
out += decodeStr(uint8.subarray(pos - 1, end));
break;
napi/parser/src-js/generated/deserialize/js.js
+2 -2
View File
@@ -5,7 +5,7 @@ let uint8, uint32, float64, sourceText, sourceIsAscii, sourceEndPos, firstNonAsc
const textDecoder = new TextDecoder("utf-8", { ignoreBOM: true }),
decodeStr = textDecoder.decode.bind(textDecoder),
{ fromCodePoint } = String;
{ fromCharCode } = String;
export function deserialize(buffer, sourceText, sourceByteLen) {
sourceEndPos = sourceByteLen;
@@ -4557,7 +4557,7 @@ function deserializeStr(pos) {
c;
do {
c = uint8[pos++];
if (c < 128) out += fromCodePoint(c);
if (c < 128) out += fromCharCode(c);
else {
out += decodeStr(uint8.subarray(pos - 1, end));
break;
napi/parser/src-js/generated/deserialize/js_parent.js
+2 -2
View File
@@ -12,7 +12,7 @@ let uint8,
const textDecoder = new TextDecoder("utf-8", { ignoreBOM: true }),
decodeStr = textDecoder.decode.bind(textDecoder),
{ fromCodePoint } = String;
{ fromCharCode } = String;
export function deserialize(buffer, sourceText, sourceByteLen) {
sourceEndPos = sourceByteLen;
@@ -5094,7 +5094,7 @@ function deserializeStr(pos) {
c;
do {
c = uint8[pos++];
if (c < 128) out += fromCodePoint(c);
if (c < 128) out += fromCharCode(c);
else {
out += decodeStr(uint8.subarray(pos - 1, end));
break;
napi/parser/src-js/generated/deserialize/js_range.js
+2 -2
View File
@@ -5,7 +5,7 @@ let uint8, uint32, float64, sourceText, sourceIsAscii, sourceEndPos, firstNonAsc
const textDecoder = new TextDecoder("utf-8", { ignoreBOM: true }),
decodeStr = textDecoder.decode.bind(textDecoder),
{ fromCodePoint } = String;
{ fromCharCode } = String;
export function deserialize(buffer, sourceText, sourceByteLen) {
sourceEndPos = sourceByteLen;
@@ -5099,7 +5099,7 @@ function deserializeStr(pos) {
c;
do {
c = uint8[pos++];
if (c < 128) out += fromCodePoint(c);
if (c < 128) out += fromCharCode(c);
else {
out += decodeStr(uint8.subarray(pos - 1, end));
break;
napi/parser/src-js/generated/deserialize/js_range_parent.js
+2 -2
View File
@@ -12,7 +12,7 @@ let uint8,
const textDecoder = new TextDecoder("utf-8", { ignoreBOM: true }),
decodeStr = textDecoder.decode.bind(textDecoder),
{ fromCodePoint } = String;
{ fromCharCode } = String;
export function deserialize(buffer, sourceText, sourceByteLen) {
sourceEndPos = sourceByteLen;
@@ -5639,7 +5639,7 @@ function deserializeStr(pos) {
c;
do {
c = uint8[pos++];
if (c < 128) out += fromCodePoint(c);
if (c < 128) out += fromCharCode(c);
else {
out += decodeStr(uint8.subarray(pos - 1, end));
break;
napi/parser/src-js/generated/deserialize/ts.js
+2 -2
View File
@@ -5,7 +5,7 @@ let uint8, uint32, float64, sourceText, sourceIsAscii, sourceEndPos, firstNonAsc
const textDecoder = new TextDecoder("utf-8", { ignoreBOM: true }),
decodeStr = textDecoder.decode.bind(textDecoder),
{ fromCodePoint } = String;
{ fromCharCode } = String;
export function deserialize(buffer, sourceText, sourceByteLen) {
sourceEndPos = sourceByteLen;
@@ -4866,7 +4866,7 @@ function deserializeStr(pos) {
c;
do {
c = uint8[pos++];
if (c < 128) out += fromCodePoint(c);
if (c < 128) out += fromCharCode(c);
else {
out += decodeStr(uint8.subarray(pos - 1, end));
break;
napi/parser/src-js/generated/deserialize/ts_parent.js
+2 -2
View File
@@ -12,7 +12,7 @@ let uint8,
const textDecoder = new TextDecoder("utf-8", { ignoreBOM: true }),
decodeStr = textDecoder.decode.bind(textDecoder),
{ fromCodePoint } = String;
{ fromCharCode } = String;
export function deserialize(buffer, sourceText, sourceByteLen) {
sourceEndPos = sourceByteLen;
@@ -5430,7 +5430,7 @@ function deserializeStr(pos) {
c;
do {
c = uint8[pos++];
if (c < 128) out += fromCodePoint(c);
if (c < 128) out += fromCharCode(c);
else {
out += decodeStr(uint8.subarray(pos - 1, end));
break;
napi/parser/src-js/generated/deserialize/ts_range.js
+2 -2
View File
@@ -5,7 +5,7 @@ let uint8, uint32, float64, sourceText, sourceIsAscii, sourceEndPos, firstNonAsc
const textDecoder = new TextDecoder("utf-8", { ignoreBOM: true }),
decodeStr = textDecoder.decode.bind(textDecoder),
{ fromCodePoint } = String;
{ fromCharCode } = String;
export function deserialize(buffer, sourceText, sourceByteLen) {
sourceEndPos = sourceByteLen;
@@ -5439,7 +5439,7 @@ function deserializeStr(pos) {
c;
do {
c = uint8[pos++];
if (c < 128) out += fromCodePoint(c);
if (c < 128) out += fromCharCode(c);
else {
out += decodeStr(uint8.subarray(pos - 1, end));
break;
napi/parser/src-js/generated/deserialize/ts_range_parent.js
+2 -2
View File
@@ -12,7 +12,7 @@ let uint8,
const textDecoder = new TextDecoder("utf-8", { ignoreBOM: true }),
decodeStr = textDecoder.decode.bind(textDecoder),
{ fromCodePoint } = String;
{ fromCharCode } = String;
export function deserialize(buffer, sourceText, sourceByteLen) {
sourceEndPos = sourceByteLen;
@@ -6003,7 +6003,7 @@ function deserializeStr(pos) {
c;
do {
c = uint8[pos++];
if (c < 128) out += fromCodePoint(c);
if (c < 128) out += fromCharCode(c);
else {
out += decodeStr(uint8.subarray(pos - 1, end));
break;
tasks/ast_tools/src/generators/raw_transfer.rs
+2 -2
View File
@@ -150,7 +150,7 @@ fn generate_deserializers(
const textDecoder = new TextDecoder('utf-8', {{ ignoreBOM: true }}),
decodeStr = textDecoder.decode.bind(textDecoder),
{{ fromCodePoint }} = String;
{{ fromCharCode }} = String;
/* IF LOC */
const NodeProto = Object.create(Object.prototype, {{
@@ -948,7 +948,7 @@ static STR_DESERIALIZER_BODY: &str = "
do {
c = uint8[pos++];
if (c < 0x80) {
out += fromCodePoint(c);
out += fromCharCode(c);
} else {
out += decodeStr(uint8.subarray(pos - 1, end));
break;