Is there any alternative for current.update() method in servicenow?

Hello Everyone,

I have a business scenario where if i create an incident in InstanceA, it should create an incident in InstanceB. Also, any updates made to an incident in InstanceA should also reflect in InstanceB. I have configured a REST message and also a Business Rule. The problem is, i have used current.update() at the end of my BR and its causing performance issues while executing insert/update actions. Is there any alternative to this method to achieve back my performance?

Below is my BR

(function executeRule(current, previous) {

 var r = new sn_ws.RESTMessageV2('ABC to MSP Rest Message ', 'ABC to MSP');
 r.setStringParameterNoEscape('u_short_description', current.short_description);
 r.setStringParameterNoEscape('u_impact', current.impact);
 r.setStringParameterNoEscape('u_configuration_item', current.cmdb_ci);
 r.setStringParameterNoEscape('u_incnumber_abc', current.number);
 r.setStringParameterNoEscape('u_subcategory', current.subcategory);
 r.setStringParameterNoEscape('u_caller', current.caller_id);
 r.setStringParameterNoEscape('u_sysid_abc', current.sys_id);
 r.setStringParameterNoEscape('u_urgency', current.urgency);
 r.setStringParameterNoEscape('u_category', current.category);
 r.setStringParameterNoEscape('u_description', current.description);

 var response = r.execute();
 var responseBody = response.getBody();
 var parsed_response=JSON.parse(responseBody);
 var id =parsed_response.result[0].sys_id;
 var id1 =parsed_response.result[0].display_value;
 current.u_msp_incident_sysid = id;
 current.u_msp_incident_number = id1;
 current.update();
 var httpStatus = response.getStatusCode();