Performance issues on Firefox with debugger open

[irisjae]

I've been testing my app with SQL.js on Chrome and Firefox. With the debugger closed, queries perform with reasonable (<1ms) query times on both browsers. However, with the debugger open, SQL.js performs as expected on Chrome, but however, on Firefox, queries become much slower (on the order of magnitude of 100ms). This makes debugging quite painful.

Is this a known issue, and are there workarounds?

Thanks.