Splash screens :))
JS designed in 10 days, compared to Closure development of 10 years.
Not taken seriously until JS: The Good Parts
Node.js – set of async IO libraries married to the JS virtual machine distributed as a package.
Strong opinions about Node.
ASM.js – subset of JS designed to compile very closely to native code.
Type annotations via weird structures.
Tooling around ASM has to develop.
We can run compiler inside a web browser from a zsh shell with jobs support.
Virtual memory – arbitrary mapping through a mapping table.
Protection rings – protection apps from other apps
Ring 0 – kernel
Ring 1, Ring 2 – not really used
Ring 3 – user land
Function calls – pushing registers to stack to save its state.
System calls – via interrupts.
Happening almost every-time on computer – it’s a lot of overhead. It has to be there, but programmers doesn’t care about that.
VM is protecting programmers from overriding memory.
Most programmers doesn’t know about low-level stuff.