Speed up time correction factors

[shimwell]

Description

speeds up the time_correction_factors function by vectorizing more of the calculation.

Fixes # (issue)

Checklist

• I have performed a self-review of my own code
• I have followed the style guidelines for Python source files (if applicable)

[paulromano]

What is the motivation to speed this up? In my experience, computing these time correction factors takes a fraction of a second.

[shimwell]

What is the motivation to speed this up? In my experience, computing these time correction factors takes a fraction of a second.

I was originally tring to speed up the apply_time_correction function. Unfortunatly I couldn't see any way to speed it up. I call it around 1000 times when running post processing on d1s results (tens of plasma shots with extra data points between and cooling dasta points). Speed up in this function would be helpful as the post processing time is not insignificant for this use case. Then i got distracted and tried to speed up the wrong function :-)