faster json decode

source/mach.c

@@ -1804,7 +1804,7 @@ JSValue JS_CallRegisterVM(JSContext *ctx, JSCodeRegister *code,
     }
 
     default:
-      result = JS_ThrowInternalError(ctx, "unknown register VM opcode %d", op);
+      printf("unknown register VM opcode %d: %s\n", op, mach_opcode_names[op]);
       goto done;
     }
     continue;

source/quickjs-internal.h

@@ -469,7 +469,6 @@ typedef enum MachOpcode {
   MACH_JMPNULL,       /* if R(A)==null: pc += sBx */
 
   /* Function calls — Lua-style consecutive registers (legacy .mach) */
-  MACH_CALL,          /* (removed — placeholder to preserve opcode numbering) */
   MACH_RETURN,        /* Return R(A) */
   MACH_RETNIL,        /* Return null */
 
@@ -488,8 +487,6 @@ typedef enum MachOpcode {
   MACH_HASPROP,       /* R(A) = R(C) in R(B)      — has property check */
   MACH_REGEXP,        /* R(A) = regexp(K(B), K(C)) — regex literal */
 
-  MACH_CALLMETHOD,    /* (removed — placeholder to preserve opcode numbering) */
-
   MACH_EQ_TOL,        /* R(A) = eq_tol(R(B), R(B+1), R(B+2)), C=3 */
   MACH_NEQ_TOL,       /* R(A) = ne_tol(R(B), R(B+1), R(B+2)), C=3 */
 
@@ -651,7 +648,6 @@ static const char *mach_opcode_names[MACH_OP_COUNT] = {
   [MACH_JMPTRUE] = "jmptrue",
   [MACH_JMPFALSE] = "jmpfalse",
   [MACH_JMPNULL] = "jmpnull",
-  [MACH_CALL] = "call",
   [MACH_RETURN] = "return",
   [MACH_RETNIL] = "retnil",
   [MACH_NEWOBJECT] = "newobject",
@@ -664,7 +660,6 @@ static const char *mach_opcode_names[MACH_OP_COUNT] = {
   [MACH_DELETEINDEX] = "deleteindex",
   [MACH_HASPROP] = "hasprop",
   [MACH_REGEXP] = "regexp",
-  [MACH_CALLMETHOD] = "callmethod",
   [MACH_EQ_TOL] = "eq_tol",
   [MACH_NEQ_TOL] = "neq_tol",
   [MACH_NOP] = "nop",

source/runtime.c

@@ -5221,7 +5221,8 @@ static JSValue cjson_to_jsvalue (JSContext *ctx, const cJSON *item) {
   if (cJSON_IsString (item)) return JS_NewString (ctx, item->valuestring);
   if (cJSON_IsArray (item)) {
     int n = cJSON_GetArraySize (item);
-    JSValue arr = JS_NewArray (ctx);
+    JSValue arr = JS_NewArrayLen (ctx,n);
+    printf("array size %d\n", n);
     for (int i = 0; i < n; i++) {
       cJSON *child = cJSON_GetArrayItem (item, i);
       JS_SetPropertyNumber (ctx, arr, i, cjson_to_jsvalue (ctx, child));