babakfp•13mo ago

Trying to benchmark `Deno.remove` but it fails

deno bench --allow-write bench.ts
Check file:///C:/Users/babak/OneDrive/Desktop/deno-benchmark-345654/bench.ts
cpu: Intel(R) Core(TM) i7-10750H CPU @ 2.60GHz
runtime: deno 1.36.4 (x86_64-pc-windows-msvc)

file:///C:/Users/babak/OneDrive/Desktop/deno-benchmark-345654/bench.ts
Deno.remove  error: NotFound: The system cannot find the file specified. (os error 2): remove './assets'
    await Deno.remove("./assets", { recursive: true })
    ^
    at async Object.remove (ext:deno_fs/30_fs.js:201:3)
    at async file:///C:/Users/babak/OneDrive/Desktop/deno-benchmark-345654/bench.ts:2:5  
error: Bench failed

deno bench --allow-write bench.ts
Check file:///C:/Users/babak/OneDrive/Desktop/deno-benchmark-345654/bench.ts
cpu: Intel(R) Core(TM) i7-10750H CPU @ 2.60GHz
runtime: deno 1.36.4 (x86_64-pc-windows-msvc)

file:///C:/Users/babak/OneDrive/Desktop/deno-benchmark-345654/bench.ts
Deno.remove  error: NotFound: The system cannot find the file specified. (os error 2): remove './assets'
    await Deno.remove("./assets", { recursive: true })
    ^
    at async Object.remove (ext:deno_fs/30_fs.js:201:3)
    at async file:///C:/Users/babak/OneDrive/Desktop/deno-benchmark-345654/bench.ts:2:5  
error: Bench failed

6 Replies

ioB•13mo ago

The benchmark runs the code several times In this case, it ran it once, deleted the folder, and ran it again and found no folder to delete You need to re-add the folder every time

babakfpOP•13mo ago

Aha Thanks for that. Is there a way to tell it to run only once?

NDH•13mo ago

just use performance.now() for single test

ioB•13mo ago

you cannot get an accurate benchmark off of one deletion, so no, but you can do what @BuenoFan suggested

NDH•13mo ago

const start = performance.now();
// do something
const took = performance.now() - start;

const start = performance.now();
// do something
const took = performance.now() - start;

babakfpOP•13mo ago

Alright, thanks guys 🌸🌸