Compute

Simple Compute Intensive Task

This is a compute intensive task example. A CPU-intensive function that performs meaningless math inside five nested loops, resulting in O(n⁵) time complexity. For this example we can use the standard proplet deployment without any additional configuration.

Source Code

The source code is available in the examples/compute directory.

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Create Task

To create a task for this example, we need to build the example to wasm and then create a task with the wasm file.

cd propeller
make compute

Your output should look like this:

GOOS=js GOARCH=wasm tinygo build -buildmode=c-shared -o build/compute.wasm -target wasip1 examples/compute/compute.go

Now we can create a task with the wasm file:

curl -X POST "http://localhost:7070/tasks" \
-H "Content-Type: application/json" \
-d '{"name": "compute", "inputs": [50]}'

Your output should look like this:

{
  "id": "f52feef1-32aa-4506-a13a-b674e7010d61",
  "name": "compute",
  "kind": "standard",
  "state": 0,
  "cli_args": null,
  "inputs": [50],
  "daemon": false,
  "encrypted": false,
  "start_time": "0001-01-01T00:00:00Z",
  "finish_time": "0001-01-01T00:00:00Z",
  "created_at": "2026-02-13T11:06:42.63783147Z",
  "updated_at": "0001-01-01T00:00:00Z",
  "next_run": "0001-01-01T00:00:00Z",
  "priority": 50
}

Upload Wasm

Now we need to upload the wasm file:

curl -X PUT "http://localhost:7070/tasks/f52feef1-32aa-4506-a13a-b674e7010d61/upload" \
-F "file=@$(pwd)/build/compute.wasm"

Your output should look like this:

{
  "id": "f52feef1-32aa-4506-a13a-b674e7010d61",
  "name": "compute",
  "kind": "standard",
  "state": 0,
  "file": "...<redacted>...",
  "cli_args": null,
  "inputs": [50],
  "daemon": false,
  "encrypted": false,
  "start_time": "0001-01-01T00:00:00Z",
  "finish_time": "0001-01-01T00:00:00Z",
  "created_at": "2026-02-13T11:06:42.63783147Z",
  "updated_at": "2026-02-13T11:08:48.871743865Z",
  "next_run": "0001-01-01T00:00:00Z",
  "priority": 50
}

Start Task

Now we can start the task:

curl -X POST "http://localhost:7070/tasks/f52feef1-32aa-4506-a13a-b674e7010d61/start"

Your output should look like this:

{ "started": true }

The results of the task will be something like this.

curl -X GET "http://localhost:7070/tasks/f52feef1-32aa-4506-a13a-b674e7010d61"

Your output should look like this:

{
  "id": "f52feef1-32aa-4506-a13a-b674e7010d61",
  "name": "compute",
  "kind": "standard",
  "state": 3,
  "file": "...<redacted>...",
  "cli_args": null,
  "inputs": [50],
  "daemon": false,
  "encrypted": false,
  "proplet_id": "a95517f9-5655-4cf5-a7c8-aa00290b3895",
  "results": "1377515305\n",
  "start_time": "2026-02-13T11:09:20.161723391Z",
  "finish_time": "2026-02-13T11:09:31.03520968Z",
  "created_at": "2026-02-13T11:06:42.63783147Z",
  "updated_at": "2026-02-13T11:09:31.03520964Z",
  "next_run": "0001-01-01T00:00:00Z",
  "priority": 50
}

Invoking Using WasmTime

wasmtime --invoke compute ./build/compute.wasm 50

The results of the task will be something like this.

warning: using `--invoke` with a function that takes arguments is experimental and may break in the future
warning: using `--invoke` with a function that returns values is experimental and may break in the future
1377515305

Addition

Addition example

Addition WAT

Addition WAT example

On this page

Source Code Create Task Upload Wasm Start Task Invoking Using WasmTime