Archive for August 31, 2016

Wednesday, August 31, 2016 [Tweets] [Favorites]

SuperDuper 2.9

Dave Nanian (product page):

The result of all this (beyond slowing copies down) is that Antivirus users are being informed of potential threats constantly, and before v2.9, each of these pseudo-threats would cause SuperDuper! to stop, because they’re flagged as errors (specifically, “Permission Denied” errors) when we try to open the file for copying.

[…]

So, we’ve added a new preference -- which defaults to ON -- that ignores “Permission Denied” errors. We do log any occurrences, but we don’t fail the copy.

If you don’t use antivirus software, you’ll probably want to turn this off immediately.

Also from the release notes:

Restored dyld cache rebuild after copy for 10.8 and later

[…]

Hard linked files made invalid in 10.10.3 will be now be copied instead of failing due to a link permission error

Previously: Xcode 8 Illegal Hard Links Prevent Cloning.

Graphing Calculator for iOS

Pacific Tech (video via Ron Avitzur, App Store):

Thirty years in the making, we are proud to announce the Pacific Tech Graphing Calculator for iOS.

Previously: The Graphing Calculator Story.

VMware Fusion 8.5 Announced, Free

VMware:

This is an exciting release for us because it marks the first time that we have provided a yearly update for no additional cost to current-version customers. We’ve been holding the surprise in for some time, so we’re very excited to finally share this with the world.

Jon Brodkin:

While you’ll have to be a Fusion 8 or Workstation 12 customer to qualify for a free upgrade, VMware pricing will remain the same. The company is also extending reduced pricing to older versions of the software. Workstation 12 Pro costs $250, or $150 for users upgrading from Workstation 7 (released in October 2009) or higher.

[…]

VMware users have had cause for concern since January when the company laid off developers in the hosted UI team responsible for Fusion and Workstation.

But “we’re very much alive and well” despite the staffing changes and pending merger of Dell and VMware owner EMC, Roy said. “We’re really excited about what we’ve got, we’re definitely not dead.”

[…]

VMware has had to make other compromises to save money. For example, Workstation 12 last year removed the Unity view for Linux host and guest operating systems.

Reid Huyssen:

VMware fired the entire team that develops Fusion and Workstation. You can upgrade to the newest version for free now! But who developed it?

Previously: VMware Fusion.

The Myth of RAM

Emil Ernerfeldt (via Russ Bishop, Hacker News, Reddit):

This article is the first of four in a series, in which I argue that thinking of a memory access as O(1) is generally a bad idea, and we should instead think of them as taking O(√N) time. In part one I lay out a hand-wavy argument based on a benchmark. In part II I build up a mathematical argument based in theoretical physics, and in part III I investigate some implications. Part IV is a FAQ in which I answers some common questions and misunderstandings.

I think he’s misusing O-notation by not focusing on the asymptotic behavior. However, the general point that memory access times are nonuniform and layers of cache matter is sound.

See also: Erik Demaine’s Memory Hierarchy lectures.

Update (2016-08-31): See also: CacheFun (via McCloud).