virtualirfan

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
Send 1K bytes over 1 Gbps network        10,000   ns    0.01 ms
Read 4K randomly from SSD               150,000   ns    0.15 ms
Read 1 MB sequentially from memory      250,000   ns    0.25 ms
Round trip within same datacenter       500,000   ns    0.5  ms

virtualirfan

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

virtualirfan

# Install `dnsmasq` and configure for *.dev domains

$ brew install dnsmasq
$ vim /usr/local/etc/dnsmasq.conf

# Reload configuration and clear cache

$ sudo launchctl unload /Library/LaunchDaemons/homebrew.mxcl.dnsmasq.plist
$ sudo launchctl load /Library/LaunchDaemons/homebrew.mxcl.dnsmasq.plist
$ dscacheutil -flushcache

virtualirfan

Latency Comparison Numbers
--------------------------
L1 cache reference/hit                       1.5 ns                      4 cycles
Floating-point add/mult/FMA operation        1.5 ns                      4 cycles
L2 cache reference/hit                       5   ns                      12 ~ 17 cycles
Branch mispredict                            6   ns                      15 ~ 20 cycles
L3 cache hit (unshared cache line)          16   ns                      42 cycles
L3 cache hit (shared line in another core)  25   ns                      65 cycles
Mutex lock/unlock                           25   ns
L3 cache hit (modified in another core)     29   ns                      75 cycles

virtualirfan

import sri.core.{ComponentConstructor, ReactClass}

import scala.scalajs.js
import scala.scalajs.js.ConstructorTag

object LcHoc {
  def apply[T <: ReactClass {type PropsType; type StateType}](params: js.UndefOr[LcHocParams] = js.undefined)
                                                             (implicit tag: ConstructorTag[T]): ComponentConstructor {
    type ComponentType = T
    type PropsType = T#PropsType