Hello xenadu,
I have similar scenario like you except the scripts are not 'safe' in my case. Performance is also important in my case so I did some profiling and I created some performance improvements of the ClearScript engine. These improvements have very good performance impact on my application and I think, they can help also in your case. I've uploaded them to the 'PerformanceImprovements' fork on this server. I don't know if some of the improvements are merged or rewritten to the main trunk (they were commited on the 24th of Feb.).
It will be very helpfull, if you have some time and you will execute your tests also on the improved version. Would be nice to have results from independent source.
I have similar scenario like you except the scripts are not 'safe' in my case. Performance is also important in my case so I did some profiling and I created some performance improvements of the ClearScript engine. These improvements have very good performance impact on my application and I think, they can help also in your case. I've uploaded them to the 'PerformanceImprovements' fork on this server. I don't know if some of the improvements are merged or rewritten to the main trunk (they were commited on the 24th of Feb.).
It will be very helpfull, if you have some time and you will execute your tests also on the improved version. Would be nice to have results from independent source.