In this particular case the slowdown was maybe rather the backup.
I changed its time so it occurs later (between 6 and 8 AM CET, so a little before or after midnight on your time, depending on which coast you are).
I'm not sure it will work, I'll check tomorrow if the setting is well applied.

About the bots, Bing is less active at these times (theoretically) but Google does not allow any control on that