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## craft_and_synthesis.md

      
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                craft_and_synthesis
              
          
    Craft & Synthesis: Creating Software With Less Waste

Introduction

This is a book born of mistakes, of failures - my own and others - of paths trodden that are better left alone, and of tidbits of wisdom that, I hope, will help you reach your goals faster and with less regret. Also: empathy is the best productivity hack, which I’ll explain later.
It’s not exclusively a coding book - it’s an “everything else” book so that when you do write code, you’re solving the right problems at the right time and in the right way for that specific context.
I have no credentials to offer, but programming language design and related philosophies have been my special interest for 22 years. I’ve been creating and shipping projects solo since I was a wee thing, and I have read tens of millions of lines of code.

  
## debase_fail_ruby_3_1_2_rbenv.txt
have_header: checking for vm_core.h... -------------------- yes

LD_LIBRARY_PATH=.:/home/lilith/.rbenv/versions/3.1.2/lib "gcc -o conftest -I/home/lilith/.rbenv/versions/3.1.2/include/ruby-3.1.0/x86_64-linux -I/home/lilith/.rbenv/versions/3.1.2/include/ruby-3.1.0/ruby/backward -I/home/lilith/.rbenv/versions/3.1.2/include/ruby-3.1.0 -I. -I/home/lilith/.rbenv/sources/3.1.2/ruby-3.1.2 -I/home/lilith/.rbenv/versions/3.1.2/include    -O3 -fno-fast-math -ggdb3 -Wall -Wextra -Wdeprecated-declarations -Wduplicated-cond -Wimplicit-function-declaration -Wimplicit-int -Wmisleading-indentation -Wpointer-arith -Wwrite-strings -Wimplicit-fallthrough=0 -Wmissing-noreturn -Wno-cast-function-type -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-packed-bitfield-compat -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wsuggest-attribute=format -Wsuggest-attribute=noreturn -Wunused-variable -Wundef  -fPIC conftest

## imageflow_2020_benchmarks.txt
Using imageflow to thumbnail 32 images in parallel
0.19user 0.15system 0:00.71elapsed 48%CPU (0avgtext+0avgdata 19420maxresident)k
8inputs+928outputs (0major+42591minor)pagefaults 0swaps


Using libvips to thumbnail 32 images in parallel
10.91user 1.55system 0:03.52elapsed 353%CPU (0avgtext+0avgdata 68336maxresident)k
2264inputs+7264outputs (47major+392240minor)pagefaults 0swaps


## aspect_test.cs
using System;
using System.Collections.Generic;
using System.Drawing;
using Xunit;
using Xunit.Abstractions;


namespace AspectTesting
{


## interior_mutable_sets.rs
use ::std::cell::*;

/// Provides interior mutability for a add-only set.
/// Items can be added (a reference is returned)
/// References can be looked up via a pointer to the item
#[derive(Debug,Clone, PartialEq)]
pub struct AppendOnlySet<T>{
    slots: RefCell<Vec<Box<T>>>
}
impl<T> AppendOnlySet<T> {

## Todo: explain lifetimes better in the Rust Book
<nathanael> Why does rust care about lifetime bounds on pointers to generic types?
<delma> iamrohit7: yes if you represent graph like that
* rschiffl1n has quit (Ping timeout: 121 seconds)
<Moonlightning> iamrohit7: I guess. And to remove a node, you'd...have to travel to each of its neighbors in turn, removing that edge and the dropping neighbor's Rc holding self, and then use Rc::try_unwrap()
<delma> there is other reprentantions too
<Moonlightning> Or...unsafe black magic
* mou has quit (Ping timeout: 121 seconds)
<Moonlightning> dinfuehr: names instead of just ids?
<nathanael> Ex: https://gist.github.com/nathanaeljones/80792ff3ffb5854f7a18ba40f60c6770
<Moonlightning> dinfuehr: AFAIK, Display is only for types that have a single obvious human-readable representation. It's not implemented for most types.

## imageflow_pinvoke.h

#ifndef cheddar_generated_imageflow_pinvoke_h
#define cheddar_generated_imageflow_pinvoke_h


#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>

## imageflow.h

#ifndef cheddar_generated_imageflow_h
#define cheddar_generated_imageflow_h


#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>

## rust_refcell.rs
#![feature(alloc)]
#![feature(oom)]

pub mod ffi;
pub mod boring;
pub mod parsing;


#[macro_use]
extern crate json;

## bench_single_thread.txt
This version of Imageflow was used: https://github.com/imazen/imageflow/commit/80d38f8c471d60a89dfebe9543fb364b99c7743e
The benchmark script is here: https://github.com/imazen/imageflow/blob/80d38f8c471d60a89dfebe9543fb364b99c7743e/wrappers/server/bench_single_thread.sh

./bench_single_thread.sh
This benchmark is for ubuntu 14.04.
Please run the following commands first for more accurate results
mkdir bench_in
mkdir bench_out
sudo mount -t tmpfs -o size=512M tmpfs bench_in
sudo mount -t tmpfs -o size=512M tmpfs bench_out
	have_header: checking for vm_core.h... -------------------- yes

	LD_LIBRARY_PATH=.:/home/lilith/.rbenv/versions/3.1.2/lib "gcc -o conftest -I/home/lilith/.rbenv/versions/3.1.2/include/ruby-3.1.0/x86_64-linux -I/home/lilith/.rbenv/versions/3.1.2/include/ruby-3.1.0/ruby/backward -I/home/lilith/.rbenv/versions/3.1.2/include/ruby-3.1.0 -I. -I/home/lilith/.rbenv/sources/3.1.2/ruby-3.1.2 -I/home/lilith/.rbenv/versions/3.1.2/include -O3 -fno-fast-math -ggdb3 -Wall -Wextra -Wdeprecated-declarations -Wduplicated-cond -Wimplicit-function-declaration -Wimplicit-int -Wmisleading-indentation -Wpointer-arith -Wwrite-strings -Wimplicit-fallthrough=0 -Wmissing-noreturn -Wno-cast-function-type -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-packed-bitfield-compat -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wsuggest-attribute=format -Wsuggest-attribute=noreturn -Wunused-variable -Wundef -fPIC conftest
	Using imageflow to thumbnail 32 images in parallel
	0.19user 0.15system 0:00.71elapsed 48%CPU (0avgtext+0avgdata 19420maxresident)k
	8inputs+928outputs (0major+42591minor)pagefaults 0swaps


	Using libvips to thumbnail 32 images in parallel
	10.91user 1.55system 0:03.52elapsed 353%CPU (0avgtext+0avgdata 68336maxresident)k
	2264inputs+7264outputs (47major+392240minor)pagefaults 0swaps
	using System;
	using System.Collections.Generic;
	using System.Drawing;
	using Xunit;
	using Xunit.Abstractions;


	namespace AspectTesting
	{
	use ::std::cell::*;

	/// Provides interior mutability for a add-only set.
	/// Items can be added (a reference is returned)
	/// References can be looked up via a pointer to the item
	#[derive(Debug,Clone, PartialEq)]
	pub struct AppendOnlySet<T>{
	slots: RefCell<Vec<Box<T>>>
	}
	impl<T> AppendOnlySet<T> {
	<nathanael> Why does rust care about lifetime bounds on pointers to generic types?
	<delma> iamrohit7: yes if you represent graph like that
	* rschiffl1n has quit (Ping timeout: 121 seconds)
	<Moonlightning> iamrohit7: I guess. And to remove a node, you'd...have to travel to each of its neighbors in turn, removing that edge and the dropping neighbor's Rc holding self, and then use Rc::try_unwrap()
	<delma> there is other reprentantions too
	<Moonlightning> Or...unsafe black magic
	* mou has quit (Ping timeout: 121 seconds)
	<Moonlightning> dinfuehr: names instead of just ids?
	<nathanael> Ex: https://gist.github.com/nathanaeljones/80792ff3ffb5854f7a18ba40f60c6770
	<Moonlightning> dinfuehr: AFAIK, Display is only for types that have a single obvious human-readable representation. It's not implemented for most types.

	#ifndef cheddar_generated_imageflow_pinvoke_h
	#define cheddar_generated_imageflow_pinvoke_h


	#ifdef __cplusplus
	extern "C" {
	#endif

	#include <stdint.h>

	#ifndef cheddar_generated_imageflow_h
	#define cheddar_generated_imageflow_h


	#ifdef __cplusplus
	extern "C" {
	#endif

	#include <stdint.h>
	#![feature(alloc)]
	#![feature(oom)]

	pub mod ffi;
	pub mod boring;
	pub mod parsing;


	#[macro_use]
	extern crate json;
	This version of Imageflow was used: https://github.com/imazen/imageflow/commit/80d38f8c471d60a89dfebe9543fb364b99c7743e
	The benchmark script is here: https://github.com/imazen/imageflow/blob/80d38f8c471d60a89dfebe9543fb364b99c7743e/wrappers/server/bench_single_thread.sh

	./bench_single_thread.sh
	This benchmark is for ubuntu 14.04.
	Please run the following commands first for more accurate results
	mkdir bench_in
	mkdir bench_out
	sudo mount -t tmpfs -o size=512M tmpfs bench_in
	sudo mount -t tmpfs -o size=512M tmpfs bench_out