Glad you are enjoying the book however it was written for R80.30/Gaia 3.10 and as such is getting a bit outdated, although there was an addendum released in August of 2020 for version R80.40 available at maxpowerfirewalls.com.
Lots has changed since that book was published with the introduction of CoreXL Dynamic Balancing/Split, CPU Spike Detective, Elephant/Heavy Flow handing via the pipeline paths and HyperFlow, higher ARP table size limits, the ClusterXL Correction Layer, TLS parser optimizations, GNAT/NAT Exhaustion handing & NAT Hit Counts, TailoredSafe/Autonomous Threat Prevention, USFW, Remote Access VPN/Harmony/Visitor Mode enhancements, Maestro, continuing cpview statistics enhancements, and of course the resurrection of hardware-based acceleration via NVidia and Lightspeed.
Performance improvement was clearly a very high priority for Check Point R&D over the last few years and they have done a fantastic job of automatically optimizing performance in the later gateway releases. It's almost like every time I published a book the smart people in Check Point R&D thumbed through it and said "how can we replace all this analysis and manual tuning with software?" and then they proceeded to do it, solving some very tough problems and pushing through some thorny longstanding implementation limits in the process. I have been essentially replaced with a shell script. 😀
I get asked all the time if there will be a fourth edition of Max Power, and I believe it to be unlikely as my ultimate recommendation to optimize performance is to just upgrade to R81+ and don't touch the default settings. That's it. Not very exciting reading to be sure. In fact if there was a fourth edition it would probably be much shorter than the previous books, and should probably be bundled with a small but ferocious dog which is trained to bite the firewall administrator any time they try to tamper with any default settings involving gateway performance!
However I will share that there is a new independently-produced book being written right now covering Check Point; I am not involved with writing the book but have provided some informal advice to the author. I can't say any more at this time but hopefully it will be available later this year, so keep an eye out for it!
New 2-day Live "Max Power" Series Course Now Available:
"Gateway Performance Optimization R81.20" at maxpowerfirewalls.com