We got a new MacBook Pro to test here with Core i9 CPU. This is really a mobile powerhouse and you can easily get all 12 cores busy with some real work. It looks like the MacBook Pro can do that load for half an hour easily. Yes, it may get warm above the keyboard, but it stays cold for the lower parts.
While battery may be advertised as running for 10 hours with normal usage like web surfing, well at the full work load, e.g. while compiling large project with Xcode, it may only run 70 minutes till the battery is empty. And that is to be expected as the 83.6 watt-hour battery can only deliver the 50 to 60 watts needs for the CPU for just over an hour.
GeekBench shows 4058 for Single-Core Score and 13845 for Multi-Core Score on the older MacBook Pro (15 inch, 2016) with Core i7 @2.9 GHz.
The new MacBook Pro 15 inch with Core i9 @2.9 GHz shows 5430 Single-Core Score and 23700 Multi-Core Score.
To compare, the 2 year newer model is 33% faster single-core and 70% faster multi-core.
We do not see any speed problems with the CPU and look forward to let this machine increase our productivity with more RAM and CPU power on the go than we ever had before.