update demo again, again

Use a better resolution, strip, use new RAM calculation

Cargo.lock

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+ "criterion",
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+dependencies = [
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_gnullvm",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
+
+[[package]]
+name = "windows_i686_gnullvm"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"

Cargo.toml

@@ -3,10 +3,25 @@ name = "microfetch"
 version = "0.3.5"
 edition = "2021"
 
+[lib]
+name = "microfetch_lib"
+path = "src/lib.rs"
+
+[[bin]]
+name = "microfetch"
+path = "src/main.rs"
+
 [dependencies]
 nix = { version = "0.29", features = ["fs", "hostname", "feature"] }
 color-eyre = { version = "0.6", default-features = false }
 
+[dev-dependencies]
+criterion = "0.5"
+
+[[bench]]
+name = "benchmark"
+harness = false
+
 [profile.dev]
 opt-level = 3
 

README.md

@@ -70,6 +70,12 @@ there is. The only downside of using Rust is introducing more "bloated"
 dependency trees and increasing build times. The latter is easily mitigated with
 Nix's binary cache, though._
 
+[Criterion.rs]: https://github.com/bheisler/criterion.rs
+[Getting Started Guide]: https://bheisler.github.io/criterion.rs/book/getting_started.html
+
+To benchmark individual functions, [Criterion.rs] is used. See Criterion's
+[Getting Started Guide] for details or just run `cargo bench` to benchmark
+all features of Microfetch
 ## Customizing
 
 You can't\*.

benches/benchmark.rs

@@ -0,0 +1,27 @@
+use criterion::{criterion_group, criterion_main, Criterion};
+use microfetch_lib::colors::print_dots;
+use microfetch_lib::desktop::get_desktop_info;
+use microfetch_lib::release::{get_os_pretty_name, get_system_info};
+use microfetch_lib::system::{
+    get_memory_usage, get_root_disk_usage, get_shell, get_username_and_hostname,
+};
+use microfetch_lib::uptime::get_current;
+
+fn main_benchmark(c: &mut Criterion) {
+    let utsname = nix::sys::utsname::uname().expect("lol");
+    c.bench_function("user_info", |b| {
+        b.iter(|| get_username_and_hostname(&utsname))
+    });
+    c.bench_function("os_name", |b| b.iter(get_os_pretty_name));
+    c.bench_function("kernel_version", |b| b.iter(|| get_system_info(&utsname)));
+    c.bench_function("shell", |b| b.iter(get_shell));
+
+    c.bench_function("desktop", |b| b.iter(get_desktop_info));
+    c.bench_function("uptime", |b| b.iter(get_current));
+    c.bench_function("memory_usage", |b| b.iter(get_memory_usage));
+    c.bench_function("storage", |b| b.iter(get_root_disk_usage));
+    c.bench_function("colors", |b| b.iter(print_dots));
+}
+
+criterion_group!(benches, main_benchmark);
+criterion_main!(benches);

nix/shell.nix

@@ -7,6 +7,7 @@
   rustc,
   gcc,
   rustPlatform,
+  gnuplot,
 }:
 mkShell {
   strictDeps = true;
@@ -19,6 +20,8 @@ mkShell {
     rust-analyzer-unwrapped
     rustfmt
     clippy
+
+    gnuplot # For Criterion.rs plots
   ];
 
   env.RUST_SRC_PATH = "${rustPlatform.rustLibSrc}";

src/desktop.rs

@@ -1,21 +1,13 @@
 pub fn get_desktop_info() -> String {
-    fn capitalize_first_letter(s: &str) -> String {
-        if s.is_empty() {
-            return String::new();
-        }
-
-        let mut chars = s.chars();
-        let first_char = chars.next().unwrap().to_uppercase().to_string();
-        let rest: String = chars.collect();
-        first_char + &rest
-    }
-
     // Retrieve the environment variables and handle Result types
     let desktop_env = std::env::var("XDG_CURRENT_DESKTOP");
     let display_backend_result = std::env::var("XDG_SESSION_TYPE");
 
     // Capitalize the first letter of the display backend value
-    let display_backend = capitalize_first_letter(display_backend_result.as_deref().unwrap_or(""));
+    let mut display_backend = display_backend_result.unwrap_or_default();
+    if let Some(c) = display_backend.as_mut_str().get_mut(0..1) {
+        c.make_ascii_uppercase();
+    }
 
     // Trim "none+" from the start of desktop_env if present
     // Use "Unknown" if desktop_env is empty or has an error
@@ -26,10 +18,11 @@ pub fn get_desktop_info() -> String {
 
     // Handle the case where display_backend might be empty after capitalization
     let display_backend = if display_backend.is_empty() {
-        "Unknown".to_string()
+        "Unknown"
     } else {
-        display_backend
+        &display_backend
-    };
+    }
+    .to_string();
 
     format!("{desktop_env} ({display_backend})")
 }

src/lib.rs

@@ -0,0 +1,5 @@
+pub mod colors;
+pub mod desktop;
+pub mod release;
+pub mod system;
+pub mod uptime;

src/main.rs

@@ -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());
 }

src/release.rs

@@ -1,9 +1,11 @@
 use color_eyre::Result;
-use std::fs::read_to_string;
+use nix::sys::utsname::UtsName;
-use std::io;
+use std::{
+    fs::File,
+    io::{self, Read},
+};
 
-pub fn get_system_info() -> nix::Result<String> {
+pub fn get_system_info(utsname: &UtsName) -> nix::Result<String> {
-    let utsname = nix::sys::utsname::uname()?;
     Ok(format!(
         "{} {} ({})",
         utsname.sysname().to_str().unwrap_or("Unknown"),
@@ -13,15 +15,13 @@ pub fn get_system_info() -> nix::Result<String> {
 }
 
 pub fn get_os_pretty_name() -> Result<String, io::Error> {
-    let os_release_content = read_to_string("/etc/os-release")?;
+    let mut os_release_content = String::with_capacity(1024);
+    File::open("/etc/os-release")?.read_to_string(&mut os_release_content)?;
+
     let pretty_name = os_release_content
         .lines()
         .find(|line| line.starts_with("PRETTY_NAME="))
-        .map(|line| {
+        .map(|line| line.trim_start_matches("PRETTY_NAME=").trim_matches('"'));
-            line.trim_start_matches("PRETTY_NAME=")
-                .trim_matches('"')
-                .to_string()
-        });
 
-    Ok(pretty_name.unwrap_or("Unknown".to_string()))
+    Ok(pretty_name.unwrap_or("Unknown").to_string())
 }

src/system.rs

@@ -1,15 +1,21 @@
 use color_eyre::Result;
-use nix::sys::statvfs::statvfs;
+use nix::sys::{statvfs::statvfs, utsname::UtsName};
 
-use std::env;
+use std::{
-use std::io::{self};
+    env,
+    fs::File,
+    io::{self, Read},
+};
 
 use crate::colors::{CYAN, GREEN, RED, RESET, YELLOW};
 
-pub fn get_username_and_hostname() -> String {
+pub fn get_username_and_hostname(utsname: &UtsName) -> String {
     let username = env::var("USER").unwrap_or("unknown_user".to_string());
-    let hostname = nix::unistd::gethostname().unwrap_or("unknown_host".to_string().into());
+    let hostname = utsname
-    let hostname = hostname.to_string_lossy();
+        .nodename()
+        .to_str()
+        .unwrap_or("unknown_host")
+        .to_string();
 
     format!("{YELLOW}{username}{RED}@{GREEN}{hostname}")
 }
@@ -45,13 +51,20 @@ pub fn get_memory_usage() -> Result<String, io::Error> {
         let mut total_memory_kb = 0.0;
         let mut available_memory_kb = 0.0;
 
-        for line in std::fs::read_to_string("/proc/meminfo")?.lines() {
+        let mut meminfo = String::with_capacity(2048);
+        File::open("/proc/meminfo")?.read_to_string(&mut meminfo)?;
+
+        for line in meminfo.lines() {
             let mut split = line.split_whitespace();
-            let key = split.next().unwrap_or("");
+            match split.next().unwrap_or_default() {
-            if key == "MemTotal:" {
+                "MemTotal:" => total_memory_kb = split.next().unwrap_or("0").parse().unwrap_or(0.0),
-                total_memory_kb = split.next().unwrap_or("0").parse().unwrap_or(0.0);
+                "MemAvailable:" => {
-            } else if key == "MemAvailable:" {
+                    available_memory_kb = split.next().unwrap_or("0").parse().unwrap_or(0.0);
-                available_memory_kb = split.next().unwrap_or("0").parse().unwrap_or(0.0);
+
+                    // MemTotal comes before MemAvailable, stop parsing
+                    break;
+                }
+                _ => (),
             }
         }