mirror of
https://github.com/denoland/deno.git
synced 2024-11-14 16:33:45 -05:00
64 lines
2.6 KiB
Markdown
64 lines
2.6 KiB
Markdown
## Internal details
|
|
|
|
### Deno and Linux analogy
|
|
|
|
| **Linux** | **Deno** |
|
|
| ------------------------------: | :------------------------------------------- |
|
|
| Processes | Web Workers |
|
|
| Syscalls | Ops |
|
|
| File descriptors (fd) | [Resource ids (rid)](architecture#resources) |
|
|
| Scheduler | Tokio |
|
|
| Userland: libc++ / glib / boost | https://deno.land/std/ |
|
|
| /proc/\$\$/stat | [Deno.metrics()](architecture#metrics) |
|
|
| man pages | deno types |
|
|
|
|
#### Resources
|
|
|
|
Resources (AKA `rid`) are Deno's version of file descriptors. They are integer
|
|
values used to refer to open files, sockets, and other concepts. For testing it
|
|
would be good to be able to query the system for how many open resources there
|
|
are.
|
|
|
|
```ts
|
|
console.log(Deno.resources());
|
|
// { 0: "stdin", 1: "stdout", 2: "stderr" }
|
|
Deno.close(0);
|
|
console.log(Deno.resources());
|
|
// { 1: "stdout", 2: "stderr" }
|
|
```
|
|
|
|
#### Metrics
|
|
|
|
Metrics is Deno's internal counter for various statistics.
|
|
|
|
```shell
|
|
> console.table(Deno.metrics())
|
|
┌─────────────────────────┬───────────┐
|
|
│ (idx) │ Values │
|
|
├─────────────────────────┼───────────┤
|
|
│ opsDispatched │ 9 │
|
|
│ opsDispatchedSync │ 0 │
|
|
│ opsDispatchedAsync │ 0 │
|
|
│ opsDispatchedAsyncUnref │ 0 │
|
|
│ opsCompleted │ 9 │
|
|
│ opsCompletedSync │ 0 │
|
|
│ opsCompletedAsync │ 0 │
|
|
│ opsCompletedAsyncUnref │ 0 │
|
|
│ bytesSentControl │ 504 │
|
|
│ bytesSentData │ 0 │
|
|
│ bytesReceived │ 856 │
|
|
└─────────────────────────┴───────────┘
|
|
```
|
|
|
|
### Schematic diagram
|
|
|
|
|
|
|
|
### Conference
|
|
|
|
- Ryan Dahl. (May 27, 2020).
|
|
[An interesting case with Deno](https://www.youtube.com/watch?v=1b7FoBwxc7E).
|
|
Deno Israel.
|
|
- Bartek Iwańczuk. (Oct 6, 2020).
|
|
[Deno internals - how modern JS/TS runtime is
|
|
built](https://www.youtube.com/watch?v=AOvg_GbnsbA&t=35m13s). Paris Deno.
|