hellerbarde

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

amal

@file:Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")

// Tooltip implementation for AndroidX Jetpack Compose
// See usage example in the next file

// Tested with Compose version **1.1.0-alpha06**
// Based on material DropdownMenu implementation.

import androidx.compose.animation.core.MutableTransitionState
import androidx.compose.animation.core.animateFloat

dev-niiaddy

@Composable
fun rememberQrBitmapPainter(
    content: String,
    size: Dp = 150.dp,
    padding: Dp = 0.dp
): BitmapPainter {

    val density = LocalDensity.current
    val sizePx = with(density) { size.roundToPx() }
    val paddingPx = with(density) { padding.roundToPx() }

LennyLizowzskiy

import android.app.Activity
import android.content.Context
import android.content.ContextWrapper
import android.graphics.Bitmap
import android.os.Handler
import android.os.Looper
import android.view.PixelCopy
import android.view.View
import androidx.compose.foundation.Image
import androidx.compose.foundation.background

zmdominguez

#!/bin/zsh

function get_devices() {
  all_devices=$(command adb devices)
  
  # Drop the title
  all_devices=${all_devices#"List of devices attached"}

  # Drop any unauthorised devices (i.e. USB debugging disabled or authorisations revoked)
  valid_devices=$(echo $all_devices | grep -v "([[:alnum:]-]+[[:space:]]+unauthorized$)" | grep -oE "([[:alnum:]-]+[[:space:]]+device$)")

zmdominguez

This gist provides a more flexible version of adb that exposes the functionality to select a device and then use that device's serial number in one or more adb commands. It expands on the initial implementation of the deeplinks.sh gist.

Companion blog post for usage is 🔗 here.

Companion posts for earlier versions of the script: Extending an Interactive ADB

Mikkareem

import android.os.Build
import androidx.annotation.RequiresApi
import androidx.compose.foundation.background
import androidx.compose.foundation.clickable
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxSize