$ gosize ./foo/libgo-ios-package.a
4096282 (59.58%) runtime
557716 ( 8.11%) type
246300 ( 3.58%) crypto/tls
155584 ( 2.26%) net
144172 ( 2.10%) net/http
90220 ( 1.31%) github.com/tailscale/wireguard-go/device
82252 ( 1.20%) encoding/json
81408 ( 1.18%) unicode
80428 ( 1.17%) crypto/ed25519/internal/edwards25519
78796 ( 1.15%) math/big
73644 ( 1.07%) reflect
64564 ( 0.94%) fmt
54920 ( 0.80%) crypto/x509
52672 ( 0.77%) tailscale.com/wgengine/magicsock
...