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surapuramakhil / latency.txt
Created March 16, 2019 11:47 — forked from jboner/latency.txt
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
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
@surapuramakhil
surapuramakhil / fireStoreTest.dart
Last active May 24, 2020 22:42
FireStore Issue - getting instance of Document on builder callback
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:flutter/material.dart';
import 'package:flutter/painting.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_tic_tac_toe/storage/game_info_repository.dart';
class VictoriesList extends StatelessWidget {
@override
Widget build(BuildContext context) {
Firestore.instance
// Enable component-scanning and auto-configuration with @SpringBootApplication Annotation
// It combines @Configuration + @ComponentScan + @EnableAutoConfiguration
@SpringBootApplication
public class FooApplication {
public static void main(String[] args) {
// Bootstrap the application
SpringApplication.run(FooApplication.class, args);
}
}
@surapuramakhil
surapuramakhil / jpa-cheatsheet.java
Last active May 25, 2024 16:50 — forked from jahe/jpa-cheatsheet.java
JPA Cheatsheet
/*
JPA (Java Persistence API)
Transaction Management with an Entity-Mananger:
---
entityManager.getTransaction().begin();
entityManager.persist(<some-entity>);
entityManager.getTransaction().commit();
entityManager.clear();