#195 Dynamic vs static sorting

[Steve Keen]

The BIS property price database illustrates nicely the case for dynamic sorting (sort which resets when the selector dot is moved to a different date) as an alternative to the current sort, which I characterise as static sorting.

[Steve Keen]

Ravel file.

[High Performance Coder]

See https://sourceforge.net/p/minsky/ravel/155/

[High Performance Coder]

This feature is implemented, but appears to have exposed a serious bug in the system. When scrolling through an axis via arrow keys with dynamic sorting enabled, minsky will crash after a while. Examining the entrails in a debugger indicates multiple addon threads running, which just simply should not be. It appears that electron is now running an event processing model that fires off another thread for each event, so that mean I will need to add a mutex lock on each call the the backend (which is really what the Javascript virtual machine should be doing). Hope this extra lock doesn't slow things down too much.

I'll give a little more thought on this, as I wanted to work out a way of adding a thread termination signal to certain long running commands, so maybe we need to fix that first, before just adding the global mutex (sort of equivalent to Python's GIL).