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bnoordhuisbnoordhuis
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Simplify Array.fromAsync lazy loading (#982)
Store it as classic JS instead of an ES module that we need to pull apart first. Added benefit is that it shrinks the serialized representation by 5%.
1 parent 4362b73 commit 97e6ef9

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4 files changed

+101
-112
lines changed

4 files changed

+101
-112
lines changed

‎Makefile‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -80,7 +80,7 @@ codegen: $(QJSC)
8080
$(QJSC) -e -o gen/hello.c examples/hello.js
8181
$(QJSC) -e -o gen/hello_module.c -m examples/hello_module.js
8282
$(QJSC) -e -o gen/test_fib.c -M examples/fib.so,fib -m examples/test_fib.js
83-
$(QJSC) -m -ss -o gen/builtin-array-fromasync.h builtin-array-fromasync.js
83+
$(QJSC) -C -ss -o gen/builtin-array-fromasync.h builtin-array-fromasync.js
8484

8585
debug:
8686
BUILD_TYPE=Debug $(MAKE)

‎builtin-array-fromasync.js‎

Lines changed: 3 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,5 @@
1-
export function go(Array, TypeError, asyncIterator, defineProperty, iterator) {
1+
;(function(Array, TypeError, asyncIterator, defineProperty, iterator) {
2+
"use strict" // result.length=i should throw if .length is not writable
23
return async function fromAsync(arrayLike, mapFn=undefined, thisArg=undefined) {
34
if (mapFn !== undefined && typeof mapFn !== "function") throw new TypeError("not a function")
45
let result, i = 0, isConstructor = typeof this === "function"
@@ -32,4 +33,4 @@ export function go(Array, TypeError, asyncIterator, defineProperty, iterator) {
3233
result.length = i
3334
return result
3435
}
35-
}
36+
})

‎gen/builtin-array-fromasync.h‎

Lines changed: 92 additions & 98 deletions
Original file line numberDiff line numberDiff line change
@@ -2,14 +2,10 @@
22

33
#include <inttypes.h>
44

5-
const uint32_t qjsc_builtin_array_fromasync_size = 875;
5+
const uint32_t qjsc_builtin_array_fromasync_size = 826;
66

7-
const uint8_t qjsc_builtin_array_fromasync[875] = {
8-
0x13, 0x0f, 0x01, 0x34, 0x62, 0x75, 0x69, 0x6c,
9-
0x74, 0x69, 0x6e, 0x2d, 0x61, 0x72, 0x72, 0x61,
10-
0x79, 0x2d, 0x66, 0x72, 0x6f, 0x6d, 0x61, 0x73,
11-
0x79, 0x6e, 0x63, 0x2e, 0x6a, 0x73, 0x01, 0x04,
12-
0x67, 0x6f, 0x01, 0x1a, 0x61, 0x73, 0x79, 0x6e,
7+
const uint8_t qjsc_builtin_array_fromasync[826] = {
8+
0x13, 0x0d, 0x01, 0x1a, 0x61, 0x73, 0x79, 0x6e,
139
0x63, 0x49, 0x74, 0x65, 0x72, 0x61, 0x74, 0x6f,
1410
0x72, 0x01, 0x10, 0x69, 0x74, 0x65, 0x72, 0x61,
1511
0x74, 0x6f, 0x72, 0x01, 0x12, 0x61, 0x72, 0x72,
@@ -24,96 +20,94 @@ const uint8_t qjsc_builtin_array_fromasync[875] = {
2420
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40-
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41-
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42-
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117-
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23+
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0x42, 0x06, 0x00, 0x00, 0x00, 0xeb, 0x0d, 0x63,
107+
0x0a, 0x00, 0x43, 0x06, 0x00, 0x00, 0x00, 0x24,
108+
0x00, 0x00, 0x0e, 0x6f, 0x63, 0x03, 0x00, 0x63,
109+
0x04, 0x00, 0x44, 0x32, 0x00, 0x00, 0x00, 0x63,
110+
0x03, 0x00, 0x2f, 0xc0, 0x00, 0x28, 0xc0, 0x00,
111+
0xce, 0x28,
118112
};
119113

‎quickjs.c‎

Lines changed: 5 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -7409,16 +7409,10 @@ static JSValue js_bytecode_autoinit(JSContext *ctx, JSObject *p, JSAtom atom,
74097409
JS_READ_OBJ_BYTECODE);
74107410
if (JS_IsException(obj))
74117411
return JS_EXCEPTION;
7412-
JSValue mod = JS_EvalFunction(ctx, obj);
7413-
JS_FreeValue(ctx, obj);
7414-
if (JS_IsException(mod))
7412+
JSValue fun = JS_EvalFunction(ctx, obj);
7413+
if (JS_IsException(fun))
74157414
return JS_EXCEPTION;
7416-
assert(JS_IsModule(obj));
7417-
JSModuleDef *m = JS_VALUE_GET_PTR(obj);
7418-
assert(m->export_entries_count == 1);
7419-
JSExportEntry *e = &m->export_entries[0];
7420-
assert(e->export_type == JS_EXPORT_TYPE_LOCAL);
7421-
JSVarRef *v = e->u.local.var_ref;
7415+
assert(JS_IsFunction(ctx, fun));
74227416
JSValue args[] = {
74237417
JS_NewCFunction(ctx, js_array_constructor, "Array", 0),
74247418
JS_NewCFunctionMagic(ctx, js_error_constructor, "TypeError", 1,
@@ -7430,11 +7424,11 @@ static JSValue js_bytecode_autoinit(JSContext *ctx, JSObject *p, JSAtom atom,
74307424
JS_CFUNC_generic_magic, 0),
74317425
JS_AtomToValue(ctx, JS_ATOM_Symbol_iterator),
74327426
};
7433-
JSValue result = JS_Call(ctx, v->value, JS_UNDEFINED,
7427+
JSValue result = JS_Call(ctx, fun, JS_UNDEFINED,
74347428
countof(args), vc(args));
74357429
for (size_t i = 0; i < countof(args); i++)
74367430
JS_FreeValue(ctx, args[i]);
7437-
JS_FreeValue(ctx, mod);
7431+
JS_FreeValue(ctx, fun);
74387432
return result;
74397433
}
74407434
}

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