Eugene Loy EugeneLoy

## performance
Latency Comparison Numbers
--------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

## cheatsheets
Searching ---------------------------------------------------------------------

Find all files that has full filename pattern "YYY" in this rdirectory, recursive:
    find . -wholename "YYY"

Find all matches of regexp "XXX" in file YYY:
    grep -n -E "XXX" YYY

Find all occurences of "XXX" in all files with name "YYY" in this directory, recursive:
    find . -name "YYY" -print0 | xargs -0 grep -n -F "XXX"

## bping_monitor.bat
FOR /L %%N IN () DO (
  timeout /t 60
  bping -d -f=alarm.wav 4.2.2.4 -t=10 -n=1
)

## rvt_categories.json
{"locale":"uk","category_tree":[{"id":666793,"label":"Роботи","listing_shapes":[{"id":293219,"label":"Потреба"},{"id":293220,"label":"Моя допомога"}],"subcategories":[{"id":666805,"label":"IT / Розробка / Зв'язок","listing_shapes":[{"id":293219,"label":"Потреба"},{"id":293220,"label":"Моя допомога"}],"subcategories":[]},{"id":666812,"label":"Тексти / Переклади","listing_shapes":[{"id":293219,"label":"Потреба"},{"id":293220,"label":"Моя допомога"}],"subcategories":[]},{"id":667542,"label":"Прості онлайн роботи","listing_shapes":[{"id":293219,"label":"Потреба"},{"id":293220,"label":"Моя допомога"}],"subcategories":[]},{"id":666807,"label":"Дизайн / Графіка","listing_shapes":[{"id":293219,"label":"Потреба"},{"id":293220,"label":"Моя допомога"}],"subcategories":[]},{"id":666820,"label":"Перевезення / Логістика / Склад","listing_shapes":[{"id":293219,"label":"Потреба"},{"id":293220,"label":"Моя допомога"}],"subcategories":[]},{"id":666813,"label":"Проста фізична робота / Спеціальності","listing_shapes":[{"id":2932

## download_youtube_playlist.bat
youtube-dl -o "%(playlist_index)s-%(title)s.%(ext)s" -f 22 "url_here"

## Turn off Screen.bat
powershell (Add-Type '[DllImport(\"user32.dll\")]^public static extern int PostMessage(int hWnd, int hMsg, int wParam, int lParam);' -Name a -Pas)::PostMessage(-1,0x0112,0xF170,2)
	Latency Comparison Numbers
	--------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD
	Searching ---------------------------------------------------------------------

	Find all files that has full filename pattern "YYY" in this rdirectory, recursive:
	find . -wholename "YYY"

	Find all matches of regexp "XXX" in file YYY:
	grep -n -E "XXX" YYY

	Find all occurences of "XXX" in all files with name "YYY" in this directory, recursive:
	find . -name "YYY" -print0 \| xargs -0 grep -n -F "XXX"
	FOR /L %%N IN () DO (
	timeout /t 60
	bping -d -f=alarm.wav 4.2.2.4 -t=10 -n=1
	)