--trace

CLI: --trace
REST: with_trace

ValuePATH

LicensePro

Writes a performance trace alongside the render, gzip-compressed unless the path ends .trace.json. On the server, the trace is returned as a Link response header.

Scope

The trace covers the page’s renderer process, worker threads included. Cross-origin iframes run in their own process and are excluded.

Example

Run locally

zshot -f page.png \
  --trace page.trace.json.gz \
  https://zshot-cli.com/example_assets/zemu/

{
  "url": "https://zshot-cli.com/example_assets/zemu/",
  "output_type": "png",
  "with_trace": true
}

curl -X POST http://127.0.0.1:3000/ \
  -H "Content-Type: application/json" \
  -d '{"url":"https://zshot-cli.com/example_assets/zemu/","output_type":"png","with_trace":true}' \
  -D - -o page.png