To anyone that still has doubts about Construct 3's new runtime performance optimizations over the old runtime, try this and switch between the two runtimes
puu.sh/B6KJB/127748945e.c3p
For me the new runtime holds 60 FPS and 13% CPU usage
versus C2's old runtime with 29 FPS and 100% CPU usage
Anyone willingly sticking to construct2 at this point is a fool and you shouldn't listen to them and worry about why they are lying to you in bad faith