Niklas Hambüchen nh2

## example-output.txt
# ./ghc-performance-categorizer.py ghci-v-output-1.txt --sort-by time

TASK                            time ms   mem MB
------------------------------------------------
systool:cpp                           4        2
systool:merge-objects                11        3
Simplify                             38       68
ByteCodeGen                          70      164
initializing                         72      119
systool:as                          175       68

## mv-tree.py
#! /usr/bin/env python3

# Moves contents of one directory tree into another, safely.

import argparse
import filecmp
import shlex
import sys

from dataclasses import dataclass

## mmap-memory-usage.c
// Demo of how mmap() affects VIRT, RES, SHR memory usage in Linux.
//
// A useful resource for more background:
// https://techtalk.intersec.com/2013/07/memory-part-2-understanding-process-memory/

// Required for:
// * `O_TMPFILE`
// * `fallocate()`
#define _GNU_SOURCE

## outlook-dkim.md

      
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                nh2
                / outlook-dkim.md
            
            
              Created
              October 21, 2020 16:56
            
              
                Outlook apparently cannot deterministically run DKIM
              
          
      View outlook-dkim.md
  
      
    It seems Outlook is totally bugged.
I set up a mail server and sent 4 emails in a row, for the first one Microsoft said:
dkim=pass (signature was verified)

For the second one it said:

  
## configuration.nix
# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ config, pkgs, ... }:
let
  floatingIPv4 = "95.216.183.106";
  floatingIPv6 = "2a01:4f9:c01f:65::1";
in
{

## SlopProblem.hs
-- Run with:
--     ghc --make -O -threaded -fforce-recomp SlopProblem.hs && command time ./SlopProblem +RTS -N1 -s
--
-- My output with ghc 8.6.5 on a 4-core machine:
--    ...
--    336,707,456 bytes maximum residency (14 sample(s))
--    611,774,592 bytes maximum slop
--    ...
--    ... 1716344maxresident)k
-- The slop reduces to 1 MB when `-N1` is used, and the resident memory usage

## texcoord-mutator.py
#! /usr/bin/env nix-shell
#! nix-shell -i python3 -p python3Packages.plyfile


import argparse
import sys
import numpy as np
from plyfile import PlyData, PlyElement

parser = argparse.ArgumentParser(description='''

## ptgui-pro.nix
# This is for installing ptgui conveniently via nix
# or into NixOS.
# Build using e.g.:
#
#     nix-build -E '((import <nixpkgs> {}).callPackage (import ./ptgui-pro.nix) { })'
#
# and then run via
#
#     result/bin/PTGui
#

## nix-store-bup-benchmark.py
#! /usr/bin/env python3

import glob
import os
import subprocess
import sys
from itertools import zip_longest

# From https://stackoverflow.com/questions/434287/what-is-the-most-pythonic-way-to-iterate-over-a-list-in-chunks/434411#434411
def grouper(iterable, n):

## nixos-install-hetzner-cloud.sh
#! /usr/bin/env bash

# Script to install NixOS from the Hetzner Cloud NixOS bootable ISO image.
# Wipes the disk!
# Tested with Hetzner's `NixOS 20.03 (amd64/minimal)` ISO image.
#
# Run like:
#
#     curl https://nh2.me/nixos-install-hetzner-cloud.sh | sudo bash
#
	# ./ghc-performance-categorizer.py ghci-v-output-1.txt --sort-by time

	TASK time ms mem MB
	------------------------------------------------
	systool:cpp 4 2
	systool:merge-objects 11 3
	Simplify 38 68
	ByteCodeGen 70 164
	initializing 72 119
	systool:as 175 68
	#! /usr/bin/env python3

	# Moves contents of one directory tree into another, safely.

	import argparse
	import filecmp
	import shlex
	import sys

	from dataclasses import dataclass
	// Demo of how mmap() affects VIRT, RES, SHR memory usage in Linux.
	//
	// A useful resource for more background:
	// https://techtalk.intersec.com/2013/07/memory-part-2-understanding-process-memory/

	// Required for:
	// * `O_TMPFILE`
	// * `fallocate()`
	#define _GNU_SOURCE
	# Edit this configuration file to define what should be installed on
	# your system. Help is available in the configuration.nix(5) man page
	# and in the NixOS manual (accessible by running ‘nixos-help’).

	{ config, pkgs, ... }:
	let
	floatingIPv4 = "95.216.183.106";
	floatingIPv6 = "2a01:4f9:c01f:65::1";
	in
	{
	-- Run with:
	-- ghc --make -O -threaded -fforce-recomp SlopProblem.hs && command time ./SlopProblem +RTS -N1 -s
	--
	-- My output with ghc 8.6.5 on a 4-core machine:
	-- ...
	-- 336,707,456 bytes maximum residency (14 sample(s))
	-- 611,774,592 bytes maximum slop
	-- ...
	-- ... 1716344maxresident)k
	-- The slop reduces to 1 MB when `-N1` is used, and the resident memory usage
	#! /usr/bin/env nix-shell
	#! nix-shell -i python3 -p python3Packages.plyfile


	import argparse
	import sys
	import numpy as np
	from plyfile import PlyData, PlyElement

	parser = argparse.ArgumentParser(description='''
	# This is for installing ptgui conveniently via nix
	# or into NixOS.
	# Build using e.g.:
	#
	# nix-build -E '((import <nixpkgs> {}).callPackage (import ./ptgui-pro.nix) { })'
	#
	# and then run via
	#
	# result/bin/PTGui
	#
	#! /usr/bin/env python3

	import glob
	import os
	import subprocess
	import sys
	from itertools import zip_longest

	# From https://stackoverflow.com/questions/434287/what-is-the-most-pythonic-way-to-iterate-over-a-list-in-chunks/434411#434411
	def grouper(iterable, n):
	#! /usr/bin/env bash

	# Script to install NixOS from the Hetzner Cloud NixOS bootable ISO image.
	# Wipes the disk!
	# Tested with Hetzner's `NixOS 20.03 (amd64/minimal)` ISO image.
	#
	# Run like:
	#
	# curl https://nh2.me/nixos-install-hetzner-cloud.sh \| sudo bash
	#