SSD and rewriting a file millions of times

I have a MacBook with a 512GB SSD. I am somewhat new to SSD ownership, at least for a working device. I often use batch files and shell scripts to assemble working documents for projects.

My current project involves creating a CSV lookup table. The method I'm using will append the same file quite a few million times, at about 40 bytes each time.

My fear is that this will be bad for my SSD. Write caching would probably mitigate my fears, but I'm having trouble getting good data on this.

I'm not above buying an external magnetic drive, but it'd be nice not to have to.

Is this safe?

SSDs can P/E a couple petabytes, so as long as you don't plan on doing this 24x7 for 10 years, you should be fine.

Just doing a quick bit of math, 5 million @ 40 bytes is like 200MB. You could do that 6 million times just to reach 1 petabyte.

Don't worry about it, the SSD has wear leveling built in at the hardware level. Just be sure to make regular backups, because it can still fail suddenly and irrecoverably, even without a lot of repeated writes.

I thought this thread about SS Decontrol..