title: Performance logging on Cloudflare Workers
body: <p>Is it possible to add Sentry performance monitoring to Cloudflare Workers? The current Toucan-js library works well for event logging, but doesn't seem to support <code>startTransaction</code>.</p>
  <p>Using the official SDK has not worked for me - the const that receives <code>startTransaction</code> is undefined when I subsequently use it to <code>startChild</code>.</p>
  <p>Official Sentry SDK:
  <a href="https://docs.sentry.io/platforms/javascript/performance/instrumentation/custom-instrumentation/" rel="nofollow noreferrer">https://docs.sentry.io/platforms/javascript/performance/instrumentation/custom-instrumentation/</a></p>