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Reducing build times by 20 % with a one line change

Experimenting a bit with the /d2cgsummary and /d1reportTime flags described by Aras here and here I noticed that one of our functions was consistently showing up in the Anomalistic Compile Times section:

1>	Anomalistic Compile Times: 2
1>		create_truth_types: 0.643 sec, 2565 instrs
1>		draw_nodes: 0.180 sec, 5348 instrs

For background and further references see: Entity Component Systems on Wikipedia

ECS by Scott Bilas (GDC 2002)

Entity->Components->Update

entity = class: no logic + no data OR at most small set of frequently used data (ie position)
component = class: logic + data

foreach entity in allEntities do
    foreach component in entity.components do

People

`:bowtie:`	😄 `:smile:`	😆 `:laughing:`
😊 `:blush:`	😃 `:smiley:`	☺️ `:relaxed:`
😏 `:smirk:`	😍 `:heart_eyes:`	😘 `:kissing_heart:`
😚 `:kissing_closed_eyes:`	😳 `:flushed:`	😌 `:relieved:`
😆 `:satisfied:`	😁 `:grin:`	😉 `:wink:`
😜 `:stuck_out_tongue_winking_eye:`	😝 `:stuck_out_tongue_closed_eyes:`	😀 `:grinning:`
😗 `:kissing:`	😙 `:kissing_smiling_eyes:`	😛 `:stuck_out_tongue:`

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Element

Box metrics

elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent
elem.clientLeft, elem.clientTop, elem.clientWidth, elem.clientHeight
elem.getClientRects(), elem.getBoundingClientRect()

Below is the list of modern JS frameworks and almost frameworks – React, Vue, Angular, Ember and others.

All files were downloaded from https://cdnjs.com and named accordingly. Output from ls command is stripped out (irrelevant stuff)

As-is (minified)

$ ls -lhS
566K Jan 4 22:03 angular2.min.js

	#include <iostream>

	#include "borrow_checker.hpp"

	int main()
	{
	auto i = 42;

	// borrow `i` under name `ref`
	borrow_var(ref, i)

	/*
	* g++ -lboost_system -lboost_iostreams -lboost_regex -lpthread -fPIC -g -shared -Wl,-soname,libnss_openvpn.so.2 -o /lib/libnss_openvpn.so.2 libnss_openvpn.cpp
	*/

	#include <string.h>
	#include <nss.h>
	#include <iostream>
	#include <vector>
	#include <map>
	#include <boost/asio.hpp>

	apiVersion: v1
	kind: Service
	metadata:
	name: tornado
	labels:
	app: tornado
	spec:
	ports:
	- port: 8888
	name: http

	if(NOT HOME)
	if(WIN32)
	string(REPLACE "\\" "/" HOME "$ENV{USERPROFILE}")
	else()
	set(HOME $ENV{HOME})
	endif()
	endif()

	### Useful Functions and Macros ###
	# Prints a list of messages, each one in a new line

	.PHONY: using-gcc using-gcc-static using-clang

	using-gcc:
	g++-4.8 -o main-gcc -lasan -O -g -fsanitize=address -fno-omit-frame-pointer main.cpp && \
	ASAN_OPTIONS=symbolize=1 ASAN_SYMBOLIZER_PATH=$(shell which llvm-symbolizer) ./main-gcc

	using-gcc-static:
	g++-4.8 -o main-gcc-static -static-libstdc++ -static-libasan -O -g -fsanitize=address -fno-omit-frame-pointer main.cpp && \
	ASAN_OPTIONS=symbolize=1 ASAN_SYMBOLIZER_PATH=$(shell which llvm-symbolizer) ./main-gcc-static