为什么加上32字节

[kang jinci]

reading-code-of-nginx-1.9.2/nginx-1.9.2/src/http/v2/ngx_http_v2_table.c

Line 322 in 99508f1

 /* ?????????????????????????? 这里为什么要加32字节 */ 

官方文档:https://httpwg.org/specs/rfc7541.html
Note: The additional 32 octets account for an estimated overhead associated with an entry. For example, an entry structure using two 64-bit pointers to reference the name and the value of the entry and two 64-bit integers for counting the number of references to the name and value would have 32 octets of overhead.