Задержка времени ответа при использовании выборки Expo ⇐ Javascript

[Anonymous]

Я использую Expo 54, и когда я делаю запрос в первый раз, кеш App/Expo Go пуст. Ответ после ответа первой загрузки занимает около 1–5 минут, для любого URL-адреса (не только одного и того же) требуется менее 2–3 секунд.
Войдите в систему при первой загрузке (кеш пуст):


Вторая загрузка (то же самое для любого файла)


Код
import * as FileSystem from "expo-file-system/legacy";
import { Paths, File } from "expo-file-system";

const handleDownload = async (item, subject) => {
const startTotal = Date.now();
dispatch(setNote({ name: "loading", value: true }));

let cacheFile = null;

try {
const url = item?.noteUrl;
if (!item || !url) {
Alert.alert("Error", "File URL not found.");
return;
}

// File name & extension
let name = item.name || "file";
let noteType = item.noteType;
let ext = getExtensionName(url) || "pdf";

name = name
.replace(/[/\\?%*:|".]/g, "_")
.trim()
.replace(/\s+/g, "_");

const filename = `${name}.${ext}`;
const subjectName = subject.name;

console.log(` Downloading for subject: ${subjectName}`);

// Download using expo/fetch
const startDownload = Date.now();

// Using Fetch
const response = await fetch(url);
if (!response.ok)
throw new Error(`HTTP error! Status: ${response.status}`);
console.log("Response:");
console.log(response);
cacheFile = new File(Paths.cache, filename);
await cacheFile.write(await response.bytes());

const cacheUri = cacheFile.uri;

const endDownload = Date.now();
console.log(
` Download took: ${((endDownload - startDownload) / 1000).toFixed(
2
)}s`
);

// Android: Save to folder
if (Platform.OS === "android") {
console.log(" Platform: Android");

// Folder selection / creation
const startPicker = Date.now();
const graderUri = await getFolderUri(["Notes", subjectName]);
const endPicker = Date.now();
console.log(
` Folder setup took: ${((endPicker - startPicker) / 1000).toFixed(
2
)}s`
);
console.log(` Final destination URI: ${graderUri}`);

// File creation
const startCreate = Date.now();
const newUri = await FileSystem.StorageAccessFramework.createFileAsync(
graderUri,
filename,
noteType || "application/pdf"
);
const endCreate = Date.now();
console.log(
` File creation took: ${((endCreate - startCreate) / 1000).toFixed(
2
)}s`
);

// Read cache file
const startRead = Date.now();
const cacheFileBytes = await cacheFile.bytes();
const endRead = Date.now();
console.log(
` Reading cache file took: ${((endRead - startRead) / 1000).toFixed(
2
)}s`
);

// Write to SAF destination
const startWrite = Date.now();
const file = new File(newUri);
file.write(cacheFileBytes);
const endWrite = Date.now();
console.log(
` Writing to destination took: ${(
(endWrite - startWrite) /
1000
).toFixed(2)}s`
);

Alert.alert("Success ", "File saved to folder");
} else {
// iOS / Web
if (await Sharing.isAvailableAsync()) {
await Sharing.shareAsync(cacheUri, {
mimeType: noteType || "application/pdf",
});
} else {
Alert.alert("Downloaded ", `Saved to app cache: ${cacheUri}`);
}
}
} catch (error) {
console.error(" Download error:", error);
Alert.alert("Error ", error.message || "Could not save to folder.");
} finally {
// Always clean up cache
if (cacheFile) {
try {
const startDelete = Date.now();
await cacheFile.delete();
const endDelete = Date.now();
console.log(
` Cache deletion took: ${(
(endDelete - startDelete) /
1000
).toFixed(2)}s`
);
} catch (e) {
console.warn(" Failed to delete cache file:", e.message);
}
}

dispatch(setNote({ name: "loading", value: false }));

const endTotal = Date.now();
console.log(
` Total time: ${((endTotal - startTotal) / 1000).toFixed(2)}s`
);
}
};


Подробнее здесь: https://stackoverflow.com/questions/797 ... expo-fetch