Skip to content

Instantly share code, notes, and snippets.

View laxmanlax's full-sized avatar

Laxman Goswami laxmanlax

24 followers · 159 following
  • Salesforce
  • Bnagalore
View GitHub Profile
@laxmanlax
laxmanlax / latency.txt
Created April 15, 2020 15:37 — 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
@laxmanlax
laxmanlax / Python3 Virtualenv Setup.md
Created February 7, 2019 13:18 — forked from pandafulmanda/Python3 Virtualenv Setup.md
Setting up and using Python3 Virtualenv on Mac

Python3 Virtualenv Setup

Requirements
  • Python 3
  • Pip 3
$ brew install python3
@laxmanlax
laxmanlax / System Design.md
Created April 24, 2018 11:56 — forked from vasanthk/System Design.md
System Design Cheatsheet

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

  1. Clarify and agree on the scope of the system
  • User cases (description of sequences of events that, taken together, lead to a system doing something useful)
    • Who is going to use it?
    • How are they going to use it?
@laxmanlax
laxmanlax / master.vim
Created March 9, 2018 12:38 — forked from benjamincharity/master.vim
Master Vim with this interactive tutorial.
" copy all this into a vim buffer, save it, then...
" source the file by typing :so %
" Now the vim buffer acts like a specialized application for mastering vim
" There are two queues, Study and Known. Depending how confident you feel
" about the item you are currently learning, you can move it down several
" positions, all the way to the end of the Study queue, or to the Known
" queue.
" type ,, (that's comma comma)
@laxmanlax
laxmanlax / ansible_conditionals_examples.yaml
Created January 14, 2017 08:04 — forked from marcusphi/ansible_conditionals_examples.yaml
Ansible 1.3 Conditional Execution -- Very complete example with comments -- I find the conditional expressions to be ridiculously hard to get right in Ansible. I don't have a good model of what's going on under the surface so I often get it wrong. What makes it even harder is that there has been at least three different variants over the course …
---
# This has been tested with ansible 1.3 with these commands:
# ansible-playbook -i hosts ansible_conditionals_examples.yaml --extra-vars="hosts=myhosts isFirstRun=false"
# ansible-playbook -i hosts ansible_conditionals_examples.yaml --extra-vars="hosts=myhosts isFirstRun=true"
# ansible-playbook -i hosts ansible_conditionals_examples.yaml --extra-vars="hosts=myhosts"
# NB: The type of the variable is crucial!
- name: Ansible Conditionals Examples
hosts: $hosts
vars_files:
@laxmanlax
laxmanlax / boto3_hands_on.md
Created October 19, 2016 07:00 — forked from iMilnb/boto3_hands_on.md
Programmatically manipulate AWS resources with boto3 - a quick hands on

boto3 quick hands-on

This documentation aims at being a quick-straight-to-the-point-hands-on AWS resources manipulation with [boto3][0].

First of all, you'll need to install [boto3][0]. Installing it along with [awscli][1] is probably a good idea as

  • [awscli][1] is boto-based
  • [awscli][1] usage is really close to boto's
@laxmanlax
laxmanlax / lab1-vpc_ELB_combined.json
Created October 10, 2016 09:50 — forked from andreaswasita/lab1-vpc_ELB_combined.json
Lab_MainVPCStack
{
"AWSTemplateFormatVersion" : "2010-09-09",
"Description" : "Builds a VPC w/ INET Gateway and 3 public subnets. **WARNING** This template creates Amazon EC2 instance(s). You will be billed for the AWS resources used if you create a stack from this template.",
"Resources" : {
"VPC" : {
"Type" : "AWS::EC2::VPC",
"Properties" : {
@laxmanlax
laxmanlax / reinvent.md
Created September 27, 2016 08:26 — forked from henrysher/reinvent.md
link for reinvent slides
@laxmanlax
laxmanlax / no_magic.rb
Created July 25, 2016 14:27 — forked from seeker815/no_magic.rb
repo = '%s-tools' % node['lsb']['codename']
apt_repository 'scalyr-agent-2' do
uri 'http://10.100.0.xx/repo/snapshots'
arch 'amd64'
distribution repo
components [repo]
key 'http://10.100.0.xx/repo/bjn.gpg'
end
package 'scalyr-agent-2' do
@laxmanlax
laxmanlax / MaximumSumSubarray_Kadane.cpp
Created May 24, 2016 09:55 — forked from mycodeschool/MaximumSumSubarray_Kadane.cpp
#include<cmath>
#include<iostream>
#include<climits>
using namespace std;
int Maximum_Sum_Subarray(int arr[],int n) //Overall Time Complexity O(n)
{
int ans = A[0],sum = 0;
for(int i = 1;i < n; ++i) //Check if all are negative
ans = max(ans,arr[i]);