How to improve Cloud Code Performance?

Hi,I need you help . @Manuel
How to improve Cloud Code Performance ?
CPU: 4C
Mem: 16G
Parse Server Version: latest
Jmeter: 250 thread & duration=300s
Net: internal

Blockquote
Parse.Cloud.afterSave(‘Item’, async request => {
});

docker Run , cluster mode:

Blockquote
docker run --name parse-server-cloud -p 1331:1337 -v /opt/cloud:/parse-server/cloud --link proxima_proxima-postgres_1:proxima-postgres --net proxima_default -d parseplatform/parse-server:4.5.0 --appId parse --masterKey parse --databaseURI postgres://proxima:[email protected]:5432/proxima --cluster=4 --cloud /parse-server/cloud/main.js --logLevel=error