I have a website that scores 97 for PageSpeed performance. The only metric that is not doing well is the speed index. The speed index is 1.4 - 1.5. I can't seem to improve the initial server response time which is 0.77s - 1.9s.
The WordPress website is hosted on GCP, using a bitnami WordPress stack and is behind a Google Cloud Load Balancer with CDN enabled. The machine type is an e2-standard-2 which I believe is more than sufficient for the static website.
How can I further improve the initial server response time? Which server configurations I need to review and fine tune?
