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optimize market fetch cache to eliminate hashmap clone and string allocation

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Co-authored-by: Horizontal42 <75383519+Horizontal42@users.noreply.github.com>
This commit is contained in:
google-labs-jules[bot] 2026-09-04 07:16:53 +00:00
parent 37cfd2144b
commit 202b9f0df3
1 changed files with 15 additions and 4 deletions
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19
src-tauri/src/main.rs
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@ -259,6 +259,11 @@ async fn write_atomic_async(path: PathBuf, contents: String) {
let _ = tauri::async_runtime::spawn_blocking(move || write_atomic(&path, &contents)).await; let _ = tauri::async_runtime::spawn_blocking(move || write_atomic(&path, &contents)).await;
} }
async fn write_atomic_bytes_async(path: PathBuf, contents: Vec<u8>) {
let _ =
tauri::async_runtime::spawn_blocking(move || write_atomic_bytes(&path, &contents)).await;
}
/// settings.json and friends; DATA_DIR_FILE is Rust's own authorization record /// settings.json and friends; DATA_DIR_FILE is Rust's own authorization record
/// and must not be forgeable from the frontend. /// and must not be forgeable from the frontend.
fn writable_name(name: &str) -> bool { fn writable_name(name: &str) -> bool {
@ -451,6 +456,12 @@ struct MarketCache {
prices: std::collections::HashMap<String, f64>, prices: std::collections::HashMap<String, f64>,
} }
#[derive(Serialize)]
struct MarketCacheRef<'a> {
fetched_at: u64,
prices: &'a std::collections::HashMap<String, f64>,
}
#[tauri::command] #[tauri::command]
async fn fetch_market_data( async fn fetch_market_data(
app: AppHandle, app: AppHandle,
@ -518,12 +529,12 @@ async fn fetch_market_data(
} }
if !prices.is_empty() { if !prices.is_empty() {
let cache = MarketCache { let cache = MarketCacheRef {
fetched_at: now_secs(), fetched_at: now_secs(),
prices: prices.clone(), prices: &prices,
}; };
if let Ok(raw) = serde_json::to_string(&cache) { if let Ok(raw) = serde_json::to_vec(&cache) {
write_atomic_async(cache_path, raw).await; write_atomic_bytes_async(cache_path, raw).await;
} }
} }