What's the best way to clear the DNS Cache in High Sierra

Say I am using an API in a script to update a DNS A or CNAME record, and I want to clear my local cache, during script runtime to then test that my change worked. Assume I know what I'm doing and will go to the source to avoid any recursive caching issues.

Rebooting get's me the outcome, but I want to know if:

sudo killall -HUP mDNSResponder

is the best way or if there is a way to do it without killing a process or maybe even avoiding sudo.

For example, in windows you can do:

ipconfig /flushdnscache

I appreciate everyone's responses. I want to emphasize that my question was "what is the best way", not "tell me what to do". I was trying (maybe to an academic fault) to find out if there was a specific command that accomplished my need. the kill command is a workaround, in my opinion.

I don't think it's unreasonable to wish to have a strategy to accomplish a task that is not essentially - kill it and hope for the best.

I understand that while that gets me the desired outcome, it's doesn't exactly give me the warm fuzzies. I'd prefer an explicit command that is designed to achieve my desired outcome (flush dns cache). It would be even better if I could just flush a domain from the cache.

Unfortunately - I don't think there is a command that achieves this explicit outcome by design. I will continue to use the kill command to accomplish this.

Thanks for the networksetup command, I was unaware of that - although it doesn't provide me what I'm looking for. The strange situation as a developer I run into a lot is that I don't usually need to do the server type things that say - the network setup command enables because I'm not in the business of provisioning macs.

I am in the business of testing outcomes, and while the kill command will work for testing from my laptop, I will likely end up running the script from a linux box.

Thanks everyone.

Also the kill all approach just exits 0, and doesn't provide any useful feedback.

ok - So is this the best way?

Seems the there has to be a way to clear the cache without killing a process. Maybe I'm just too hopeful.

Fair enough. I assumed folks would interpret as the best "turing complete" way. haha. My bad :)