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I've been impressed not only with cloud arm performance but also usability. I had a hobby project that was using minecraft, javascript, bash, and such. IIRC absolutely nothing needed to be changed going from x86 to Arm. I got better performance (for my odd application) and better price.

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In my experience it often does go smoothly, but otoh sometimes not. The typical reason for that is when a container image dependency is not published for ARM. And then the docker tooling does not make it particularly easy for you to substitute your own ARM binary container image for a public hub-published x64-only one. And then sometimes the image won't build at all on ARM for <reasons> of the kind that waste days of your time and turn out to require building an entire Linux distribution to fix...

Yeah like New Relic not packaging its PHP agent (which they make sound trivial and I'm pretty sure it is)

https://github.com/newrelic/newrelic-php-agent/issues/323

I didn't bother taking the time to compile from scratch and figure out a way to inject it into my container image. It was a smaller client of mine. But it seems real simple to setup a second pipeline in their CI system and move on.

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