This is the case when the bottleneck is chrome. This means configuring jsreport itself won't help. But you can try to configure chrome in jsreport.config.json.
Try new headless mode
"chrome": { "launchOptions": { "headless": "new" } }Try disabling the gpu (or try to use a server with GPU card)
"chrome": { "launchOptions": { "args": ["--disable-gpu"] } }Disable accessibility tag generation
<html> <body aria-hidden="true"> ... </body> </html>