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util: improve text-decoder performance

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PR-URL: https://github.com/nodejs/node/pull/45363
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Rich Trott <rtrott@gmail.com>
This commit is contained in:
Yagiz Nizipli 2022-11-07 09:07:34 -05:00 committed by Node.js GitHub Bot
parent 86a5b71dc9
commit aed55df74b
3 changed files with 25 additions and 11 deletions
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10
lib/internal/encoding.js
View File

@ -411,15 +411,7 @@ function makeTextDecoderICU() {
decode(input = empty, options = kEmptyObject) {
validateDecoder(this);
if (isAnyArrayBuffer(input)) {
try {
input = lazyBuffer().from(input);
} catch {
// If the buffer is detached,
// use an empty Uint8Array to avoid TypeError
input = empty;
}
} else if (!isArrayBufferView(input)) {
if (!isAnyArrayBuffer(input) && !isArrayBufferView(input)) {
throw new ERR_INVALID_ARG_TYPE('input',
['ArrayBuffer', 'ArrayBufferView'],
input);

25
src/util-inl.h
View File

@ -513,8 +513,9 @@ SlicedArguments::SlicedArguments(
template <typename T, size_t S>
ArrayBufferViewContents<T, S>::ArrayBufferViewContents(
v8::Local<v8::Value> value) {
CHECK(value->IsArrayBufferView());
Read(value.As<v8::ArrayBufferView>());
DCHECK(value->IsArrayBufferView() || value->IsSharedArrayBuffer() ||
value->IsArrayBuffer());
ReadValue(value);
}
template <typename T, size_t S>
@ -542,6 +543,26 @@ void ArrayBufferViewContents<T, S>::Read(v8::Local<v8::ArrayBufferView> abv) {
}
}
template <typename T, size_t S>
void ArrayBufferViewContents<T, S>::ReadValue(v8::Local<v8::Value> buf) {
static_assert(sizeof(T) == 1, "Only supports one-byte data at the moment");
DCHECK(buf->IsArrayBufferView() || buf->IsSharedArrayBuffer() ||
buf->IsArrayBuffer());
if (buf->IsArrayBufferView()) {
Read(buf.As<v8::ArrayBufferView>());
} else if (buf->IsArrayBuffer()) {
auto ab = buf.As<v8::ArrayBuffer>();
length_ = ab->ByteLength();
data_ = static_cast<T*>(ab->Data());
} else {
CHECK(buf->IsSharedArrayBuffer());
auto sab = buf.As<v8::SharedArrayBuffer>();
length_ = sab->ByteLength();
data_ = static_cast<T*>(sab->Data());
}
}
// ECMA262 20.1.2.5
inline bool IsSafeJsInt(v8::Local<v8::Value> v) {
if (!v->IsNumber()) return false;

1
src/util.h
View File

@ -506,6 +506,7 @@ class ArrayBufferViewContents {
explicit inline ArrayBufferViewContents(v8::Local<v8::Object> value);
explicit inline ArrayBufferViewContents(v8::Local<v8::ArrayBufferView> abv);
inline void Read(v8::Local<v8::ArrayBufferView> abv);
inline void ReadValue(v8::Local<v8::Value> buf);
inline const T* data() const { return data_; }
inline size_t length() const { return length_; }