Platform Development • Re: The browser hang with 0 CPU load.

If this is right... does that mean this was using 12 parse threads before my old quad core started having an application freeze with a fresh profile, and backing off to 11 was what made it rock solid stable for me?

If it is a 4 core 8 HT CPU, then yes, you were trying to parse 12 things in parallel on a CPU that would have a capacity of ~5-6 cores worth of power, so effectively you hit the deadlock hitting a load of twice the capacity of what your CPU could handle at 100%. Considering the complexity of parsing JS, that isn't really a surprise.