Loading the Internet module from StackBeta5

by gerph 2 years ago

macOS ◆ xterm-256color ◆ fish 246 views

This is one of the betas of the Internet stack, showing how very slowly the module loads. The hourglass ticks up about one percent per second, before generating lots of accesses to zero page. There isn’t much information on what it was trying to do.

The reason that it takes so long to initialise is that it’s generating random data 4 bytes at a time, rather than trying to request all the random data it needs in one go. 32768 calls to a CryptRandom SWI, just to create the initial random data makes it take a while to initialise. The zero page accesses are because the system tries to directly access the kernel memory for the monotonic time. This is not supported on RISC OS Pyromaniac and the module doesn’t care but does it anyway. The result is that it generates a lot of warnings about zero page access as it repeatedly tries to read address 0.

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You can download this recording in asciicast v2 format, as a .cast file.

Download

Replay in terminal

You can replay the downloaded recording in your terminal using the asciinema play command:

asciinema play 479488.cast

If you don't have asciinema CLI installed then see installation instructions.

Use with stand-alone player on your website

Download asciinema player from the releases page (you only need .js and .css file), then use it like this:

<!DOCTYPE html>
<html>
<head>
  <link rel="stylesheet" type="text/css" href="asciinema-player.css" />
</head>
<body>
  <div id="player"></div>
  <script src="asciinema-player.min.js"></script>
  <script>
    AsciinemaPlayer.create(
      '/assets/479488.cast',
      document.getElementById('player'),
      { cols: 101, rows: 47 }
    );
  </script>
</body>
</html>

See asciinema player quick-start guide for full usage instructions.

While this site doesn't offer GIF conversion at the moment, you can still do it yourself with the help of asciinema GIF generator utility - agg.

Once you have it installed run the following command to create GIF file:

agg https://asciinema.org/a/479488 479488.gif

Or, if you already downloaded the recording file:

agg 479488.cast 479488.gif

Check agg --help for all available options. You can change font family and size, select color theme, adjust speed and more.

See agg manual for full usage instructions.