Mysteries...

The cross-tab proxy (a shared worker which transports messages between tabs) has some interesting latency characteristics.

• Direct request to the cross-tab proxy (httpl://pages.grim): ~2ms
• Direct request to a local in-page server (httpl://files.grim): ~1ms
• Direct request to a public server (http://grimwire.com/rel): ~58-60ms
• Proxy request through the cross-tab proxy to another page, then making a direct request to a public server (http://grimwire.com/rel): ~58-61ms
• Proxy request through the cross-tab proxy to another page, then to a local in-page server (httpl://files.grim): ~100ms-1000ms

Very strange.

local.web.dispatch({
  method: 'PROXY',
  url: 'httpl://pages.grim/0',
  headers: { 'content-type': 'application/json' },
  body: { method: 'GET', url: 'http://grimwire.com/rel' }}
)
.then(idleForSomeRandomTime) // possible bug?
.then(handleResponse);