Try to find slowdown origin in new code, probably this one

Author: nielsdos

Zend/Optimizer/dfa_pass.c

@@ -1124,14 +1124,14 @@ static void zend_dfa_optimize_send_copies(zend_op_array *op_array, const zend_ss
 				&& op_dominates(op_array, ssa, opline, op_array->opcodes + next_use)) {
 				if (op_dominates_all_uses(op_array, ssa, next_use)) {
 					op_array->opcodes[i].extended_value = 1;
-					//fprintf(stderr, "yes optimize 1\n");
+					fprintf(stderr, "yes optimize 1\n");
 				}
 			}
 		} else /* ZEND_SEND_VAR_EX */ {
 			ZEND_ASSERT(ssa->ops[i].op1_def != -1);
 			if (ssa->vars[ssa->ops[i].op1_def].no_val) {
 				op_array->opcodes[i].extended_value = 1;
-				//fprintf(stderr, "yes optimize 2\n");
+				fprintf(stderr, "yes optimize 2\n");
 			}
 		}
 	}

Zend/Optimizer/sccp.c

@@ -1050,6 +1050,8 @@ static void sccp_visit_instr(scdf_ctx *scdf, zend_op *opline, zend_ssa_op *ssa_o
 		case ZEND_SEND_VAL:
 		case ZEND_SEND_VAR:
 		{
+			if (opline->opcode == ZEND_SEND_VAR)
+				{SET_RESULT_BOT(op1);}
 			/* If the value of a SEND for an ICALL changes, we need to reconsider the
 			 * ICALL result value. Otherwise we can ignore the opcode. */
 			zend_call_info *call;