NotAShelf/microfetch
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micro optimizations (#8)

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* perf: break early after parsing required meminfo

Also a match statement for compiler magic.

* perf: pre-allocate strings when reading files

* refactor: remove duplicate .to_string()

* perf: try to print everything in one syscall

println! sends a syscall for each line.

* perf: get rid of duplicate uname syscall

* perf: simplify first letter capitalization

* refactor: directly use key in match statement
This commit is contained in:
Ryan 2024-08-15 18:32:02 +08:00 • committed by GitHub
commit 907112f2d1
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4 changed files with 52 additions and 42 deletions
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12
src/main.rs
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@ -4,6 +4,8 @@ mod release;
mod system;
mod uptime;
use std::io::Write;
use crate::colors::{print_dots, BLUE, CYAN, RESET};
use crate::desktop::get_desktop_info;
use crate::release::{get_os_pretty_name, get_system_info};
@ -15,10 +17,11 @@ use color_eyre::Report;
fn main() -> Result<(), Report> {
color_eyre::install()?;
let utsname = nix::sys::utsname::uname()?;
let fields = Fields {
user_info: get_username_and_hostname(),
user_info: get_username_and_hostname(&utsname),
os_name: get_os_pretty_name()?,
kernel_version: get_system_info()?,
kernel_version: get_system_info(&utsname)?,
shell: get_shell(),
desktop: get_desktop_info(),
uptime: get_current()?,
@ -61,7 +64,7 @@ fn print_system_info(fields: &Fields) {
colors,
} = fields;
println!(
let _ = std::io::stdout().write_all(format!(
"
{CYAN} ▟█▖ {BLUE}▝█▙ ▗█▛ {user_info} ~{RESET}
{CYAN} ▗▄▄▟██▄▄▄▄▄{BLUE}▝█▙█▛ {CYAN}▖ {CYAN} {BLUE}System{RESET} {os_name}
@ -71,5 +74,6 @@ fn print_system_info(fields: &Fields) {
{BLUE} ▟█▛{CYAN}▗█▖ {CYAN}▟█▛ {CYAN} {BLUE}Desktop{RESET} {desktop}
{BLUE} ▝█▛ {CYAN}██▖{BLUE}▗▄▄▄▄▄▄▄▄▄▄▄ {CYAN}󰍛 {BLUE}Memory{RESET} {memory_usage}
{BLUE} ▝ {CYAN}▟█▜█▖{BLUE}▀▀▀▀▀██▛▀▀▘ {CYAN}󱥎 {BLUE}Storage (/){RESET} {storage}
{CYAN} ▟█▘ ▜█▖ {BLUE}▝█▛ {CYAN} {BLUE}Colors{RESET} {colors}");
{CYAN} ▟█▘ ▜█▖ {BLUE}▝█▛ {CYAN} {BLUE}Colors{RESET} {colors}
").as_bytes());
}