Key pressing slows down program execution?

[Steve Simpkin]

(08-06-2018 05:00 PM)toml_12953 Wrote:  

(08-06-2018 01:09 AM)Tim Wessman Wrote:  The slowdown isn't on the calculator code side due to any checking, but rather some poorly written OS behaviors and drivers that we don't have any ability to change.

Why would HP use an OS over which they have no control? Seems risky to me.

Probably for the same reasons that most software developers use an OS, RTOS, TCP stack, memory manager, device driver or other software modules that were written by others on most moderate to complex projects. To save time and money in not having to write code for a task that has already been written and debugged. The tradeoff is that you often do not have control over how that code operates or any idiosyncrasies it may have. Even open source code may be difficult to modify depending on how it was written. In many cases you may have to accept the limitations of code written by others or perform workarounds to achieve the functionality/reliability you want. The other tradeoffs are the potential cost of licensing the software module/OS (which can be substantial) and the potential complexity of integrating it into your project.