flashmob / go-guerrilla

Mini SMTP server written in golang
MIT License
2.76k stars 361 forks source link

maligned structs #153

Closed tegk closed 4 years ago

tegk commented 5 years ago

Anybody that wants to save some bytes? :-)

config.go:36:19: struct of size 256 bytes could be of size 248 bytes (maligned)
type ServerConfig struct {
                  ^
config.go:63:22: struct of size 168 bytes could be of size 160 bytes (maligned)
type ServerTLSConfig struct {
                     ^
mail/rfc5321/parse.go:25:13: struct of size 168 bytes could be of size 160 bytes (maligned)
type Parser struct {
            ^
tegk commented 5 years ago

config.go:36:19: struct of size 256 bytes could be of size 248 bytes (maligned) type ServerConfig struct {

256 bytes:

// ServerConfig specifies config options for a single server
type ServerConfig struct {
    // IsEnabled set to true to start the server, false will ignore it
    IsEnabled bool `json:"is_enabled"`
    // Hostname will be used in the server's reply to HELO/EHLO. If TLS enabled
    // make sure that the Hostname matches the cert. Defaults to os.Hostname()
    Hostname string `json:"host_name"`
    // MaxSize is the maximum size of an email that will be accepted for delivery.
    // Defaults to 10 Mebibytes
    MaxSize int64 `json:"max_size"`
    // TLS Configuration
    TLS ServerTLSConfig `json:"tls,omitempty"`
    // Timeout specifies the connection timeout in seconds. Defaults to 30
    Timeout int `json:"timeout"`
    // Listen interface specified in <ip>:<port> - defaults to 127.0.0.1:2525
    ListenInterface string `json:"listen_interface"`
    // MaxClients controls how many maximum clients we can handle at once.
    // Defaults to defaultMaxClients
    MaxClients int `json:"max_clients"`
    // LogFile is where the logs go. Use path to file, or "stderr", "stdout" or "off".
    // defaults to AppConfig.Log file setting
    LogFile string `json:"log_file,omitempty"`
    // XClientOn when using a proxy such as Nginx, XCLIENT command is used to pass the
    // original client's IP address & client's HELO
    XClientOn bool `json:"xclient_on,omitempty"`
}

248 bytes:

// ServerConfig specifies config options for a single server
type ServerConfig struct {
    // TLS Configuration
    TLS ServerTLSConfig `json:"tls,omitempty"`
    // Hostname will be used in the server's reply to HELO/EHLO. If TLS enabled
    // make sure that the Hostname matches the cert. Defaults to os.Hostname()
    Hostname string `json:"host_name"`
    // MaxSize is the maximum size of an email that will be accepted for delivery.
    // Defaults to 10 Mebibytes
    // LogFile is where the logs go. Use path to file, or "stderr", "stdout" or "off".
    // defaults to AppConfig.Log file setting
    LogFile string `json:"log_file,omitempty"`
    MaxSize int64 `json:"max_size"`
    // Listen interface specified in <ip>:<port> - defaults to 127.0.0.1:2525
    ListenInterface string `json:"listen_interface"`
    // Timeout specifies the connection timeout in seconds. Defaults to 30
    Timeout int `json:"timeout"`
    // MaxClients controls how many maximum clients we can handle at once.
    // Defaults to defaultMaxClients
    MaxClients int `json:"max_clients"`
    // XClientOn when using a proxy such as Nginx, XCLIENT command is used to pass the
    // original client's IP address & client's HELO
    XClientOn bool `json:"xclient_on,omitempty"`
    // IsEnabled set to true to start the server, false will ignore it
    IsEnabled bool `json:"is_enabled"`
}
flashmob commented 5 years ago

Wow! Interesting. Never considered that one, thought that it was the compiler's job to align them, guess it was the wrong assumption.

In this situation, the struts are just json config mappings, so probably not necessary to align them, as the savings would be insignificant.

Thanks for the other code reviews. There are some donated Ether (Ethereum) funds that we'd like to distribute as rewards, and code review is one of them. Just submit your ETH address using the "Contact Support" form here https://guerrillamail.uservoice.com/ and we'll work out what the reward shall be.

tegk commented 5 years ago

Thanks, I will submit a PR in the next days.