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@skeeet
skeeet / xcode_ramdisk.sh
Created April 12, 2012 13:35 — forked from MaximKeegan/xcode_ramdisk.sh
Create a RAM disk for using with XCode
#!/bin/sh
# Create a RAM disk with same perms as mountpoint
# Script based on http://itux.idev.pro/2012/04/iservice-speed-up-your-xcode-%D0%BD%D0%B5%D0%BA%D0%BE%D1%82%D0%BE%D1%80%D1%8B%D0%B5-%D1%81%D0%BF%D0%BE%D1%81%D0%BE%D0%B1%D1%8B/ with some additions
# Usage: sudo ./xcode_ramdisk.sh start
USERNAME=$(logname)
TMP_DIR="/private/tmp"
RUN_DIR="/var/run"
SYS_CACHES_DIR="/Library/Caches"
@linpc
linpc / gist:2389778
Created April 15, 2012 03:43
#osdc.tw 2012 irc log
--- Day changed 六 4月 14 2012
00:00 < hcchien> 算了，洗澡睡覺去。明天看緣份了 :D
00:18 < cls_bsd> ....
00:34 < jnlin> hcchien: 我有...
07:37 < darkx> 大家早安
08:36 < miyagawa> which building is the venue? http://www.sinica.edu.tw/as/map/asmap_c.html
08:39 < clkao_> miyagawa: 24
08:39 < miyagawa> thanks
08:39 < clkao_> hcchien: 為什麼我的 abstract 沒有出現
08:57 clkao_ is now known as clkao
@linpc
linpc / gist:2731159
Created May 19, 2012 15:04
JSDC.tw 2012 irc log
--- Day changed 六 5月 19 2012
01:23 Robin is now known as Guest3202
01:24 Guest3202 is now known as Pymaster
01:25 Pymaster is now known as pc035860
08:40 JSDC-Kay_ is now known as JSDC-Kay
08:49 < JSDC-Kay> 大家好！我是今天負責為各位進行實況轉播的 Kay！
08:50 < JSDC-df1> 大家好！我是今天負責為各位進行實況轉播的 df1！
08:51 < Kande_> 真是太好了^^
08:51 salagadool is now known as salagadoola_
08:55 < ericsk> Good morning~
@mckamey
mckamey / bezier.js
Created September 25, 2012 16:35
JavaScript port of Webkit CSS cubic-bezier(p1x.p1y,p2x,p2y) and various approximations
/*
* Copyright (C) 2008 Apple Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
@maylogger
maylogger / picturefill.haml
Last active December 12, 2015 05:18
對應 https://github.com/scottjehl/picturefill
.pf{ "data-alt" => "", "data-picture" => "" }
%div{ "data-src" => fakeimg(300) }
%div{ "data-src" => fakeimg(300, :retina => 1), "data-media" => "(min-device-pixel-ratio: 1.5)" }
%div{ "data-src" => fakeimg(600 ), "data-media" => "(min-width: 320px)" }
%div{ "data-src" => fakeimg(600, :retina => 1), "data-media" => "(min-width: 320px) and (min-device-pixel-ratio: 1.5)" }
%div{ "data-src" => fakeimg(1200), "data-media" => "(min-width: 768px)" }
%div{ "data-src" => fakeimg(1200, :retina => 1), "data-media" => "(min-width: 768px) and (min-device-pixel-ratio: 1.5)" }
@steipete
steipete / PSPDFUIKitMainThreadGuard.m
Last active May 27, 2024 12:11
This is a guard that tracks down UIKit access on threads other than main. This snippet is taken from the commercial iOS PDF framework http://pspdfkit.com, but relicensed under MIT. Works because a lot of calls internally call setNeedsDisplay or setNeedsLayout. Won't catch everything, but it's very lightweight and usually does the job.You might n…
// Taken from the commercial iOS PDF framework http://pspdfkit.com.
// Copyright (c) 2014 Peter Steinberger, PSPDFKit GmbH. All rights reserved.
// Licensed under MIT (http://opensource.org/licenses/MIT)
//
// You should only use this in debug builds. It doesn't use private API, but I wouldn't ship it.
// PLEASE DUPE rdar://27192338 (https://openradar.appspot.com/27192338) if you would like to see this in UIKit.
#import <objc/runtime.h>
#import <objc/message.h>
@bang590
bang590 / linkmap.js
Last active August 6, 2024 14:59
XCode Linkmap Parser
var readline = require('readline'),
fs = require('fs');
var LinkMap = function(filePath) {
this.files = []
this.filePath = filePath
}
LinkMap.prototype = {
start: function(cb) {
@ethanhuang13
ethanhuang13 / xcode-beta-slink.sh
Last active February 3, 2023 20:21
Symbolic link from Xcode.app to Xcode-beta.app (Xcode 11.2)
@NSProgrammer
NSProgrammer / Overview.md
Last active March 7, 2023 08:06
Comparing modern vs legacy graphics context rendering on iOS

legacy = UIGraphicsBeginImageContextWithOptions + UIGraphicsEndImageContext

modern = UIGraphicsImageRendererFormat + UIGraphicsImageRenderer

Take aways:

  • "modern" w/ prefersExtendedRange = NO
    • basically the same perf as "legacy"
    • probably a good idea to adopt since optimizations will likely be in "modern" first
  • "modern" w/ prefersExtendedRange = YES
@tclementdev
tclementdev / libdispatch-efficiency-tips.md
Last active May 9, 2025 09:50
Making efficient use of the libdispatch (GCD)

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

  • You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.

  • Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse