optimize sructs with memory alignment / padding

[chemidy]

Another small optimizations on structs.

• middleware/compress.go :
  • struct with 48 pointer bytes could be 40
  • struct with 64 pointer bytes could be 56
• middleware/route_headers.go : struct with 72 pointer bytes could be 56
• mux.go : struct with 88 pointer bytes could be 64
• tree.go : struct with 136 pointer bytes could be 128

[vtolstov]

do yo have some go binary that check alignment and display needed changes? or tool is only says about misaligning and numbers?

[chemidy]

Sure : i'm using gopls experimental Field alignment analyzer
: https://github.com/golang/tools/releases/tag/gopls/v0.6.0#Experimental

and enabled it on vscode

  "gopls": {
    "analyses": { "fieldalignment": true }
  }