When you compare “idea to deployment” speed, a dynamic language will always win. However, much of this win is due to a dynamic language will let you deploy with a lot of bugs. So, you will then have to spend lot of time fixing production issues. Rust will force you to fix most of these issues before you can deploy, hence it feels slower in this aspect. I previously worked for 10 years with a huge perl code base, and I trade the deployment speed for stability in production any time.