alt Hacker News> We said the runtime asks the OS for large chunks of memory. Those chunks are called arenas, and on most 64-bit systems each one is 64MB (4MB on Windows and 32-bit systems, 512KB on WebAssembly).
Incorrect. You ask the OS for pages. (Golang does internally appear to manage its heap into “arenas”.) On WebAssembly the page size is 64KiB. Window 64-bit it’s 4KiB, Apple Silicon 16KiB, Linux x86_64 4KiB.
"Page" is OS terminology. "Arena" is Go terminology. An arena is made up of sequential pages. Go asks the OS for 64MB of sequential memory, and calls that 64MB chunk an arena; this is consistent with the text you quoted. It is not incorrect.