Reduce default file size in sequential write test, implement streaming read in sequential read test, set default target directory in store, and add VSCode settings for Deno support.

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "deno.enable": true
+}

dev.ts

@@ -6,7 +6,7 @@ const testPath = "./test.txt";
 const writeResult = await sequentialWriteTest(
   {
     filePath: testPath,
-    sizeInMB: 1000,
+    sizeInMB: 200,
     rounds: 10,
     bufferSizeMB: 1,
     keepTheFile: true,

speedtest/lib.ts

@@ -65,14 +65,16 @@ export async function sequentialReadTest(
 ): Promise<Progress> {
   const { filePath, rounds, deleteAfter } = options;
   const file = await Deno.open(filePath, { read: true });
-  const buffer = new Uint8Array(oneMB); // 1MB buffer
+  const reader = file.readable.getReader();
   const start = performance.now();
   let totalMB = 0;
-  while ((await file.read(buffer)) !== null) {
-    totalMB += 1;
+
+  let readResult;
+  while (!(readResult = await reader.read()).done) {
+    totalMB += readResult.value.length / oneMB;
   }
   const totalDuration = (performance.now() - start) / 1000;
-  file.close();
+  // file.close();
   if (options.deleteAfter) {
     Deno.removeSync(filePath);
   }

src/lib/store.ts

@@ -1,4 +1,4 @@
 import { writable } from "svelte/store";
 
 export const stress = writable(1);
-export const targetDir = writable<string | undefined>(undefined);
+export const targetDir = writable<string | undefined>("/Users/kunkun/Desktop");