VarunVats9

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

	// Mapping
	PUT /departments >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	{
	"mappings": {
	"properties": {
	"name": {
	"type": "text"
	},
	"employees": {
	"type": "nested"

	// Inner hits, has_child query
	GET /department/_search >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	{
	"query": {
	"has_child": {
	"type": "employee",
	"inner_hits": {},
	"query": {
	"bool": {
	"must": [

	// Filter
	GET /bank/_search >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	{
	"query": {
	"bool": {
	"must": [
	{
	"match": {
	"lastname": "Smith"
	}