It probably didn't help performance. But there's some good news: ARM has added pretty much the same thing, called MTE (Memory Tagging Extension) [1], which uses

It probably didn't help performance. But there's some good news: ARM has added pretty much the same thing, called MTE (Memory Tagging Extension) [1], which uses the upper 4 bits of memory addresses as a region identifier. [1] https://community.arm.com/developer/ip-products/processors/b/processors-ip-blog/posts/enhancing-memory-safety https://community.arm.com/developer/ip-products/processors/b...