Backblaze (bztransmit) keeps using a ton of cpu time (Mac)

Does anyone else have this problem. It has become worse lately. Using the latest version on uptodate MacOS. Several times a day I hear the fan kick into high gear on my MBP and it's because bztransmit is running. Does it really need 90% CPU usage to run a backup? This is a relatively new issue, but after 5 years I am looking for other options because its annoying and shouldn't be happening.