hnd4r7

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

	class TransactionIndexViewTests(TestCase):
	fixtures = ['transactions.json']
	def test_fixture(self):
	self.assertEqual(len(Transaction.objects.all()), 2)

	// https://go.dev/play/p/oVQ0AP7_h6D

	package main

	import (
	"fmt"
	)

	// Deref will dereference a generic pointer.
	// It will fail at compile time if pt is not a pointer.

	// +build ignore,OMIT

	// realmain runs the Subscribe example with a real RSS fetcher.
	package main

	import (
	"fmt"
	"math/rand"
	"time"