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Seo Master present to you: Domas Mituzas, a MySQL employee and Wikipedia hacker, just posted a great writeup of his recent experience using tcmalloc (an open source Google perftool) to debug some nasty memory leaks:

"Once we started profiling libc, one of initial assumptions appeared to be true - our heap was awfully fragmented, slowing down malloc()."

"Here comes our steroids part: Google has developed a drop-in malloc replacement, tcmalloc, that is really efficient. Space efficient, cpu efficient, lock efficient. This is probably the most-used (and sophisticated) libc function, that was suffering performance issues that not many people wanted to actually tackle. The description sounded really nice, so we ended up using it for our suffering Squids."

"The results were what we expected - awesome :) Now the nice part is that the library is optimized for multi-threaded applications, doing lots of allocations for small objects without too much of lock contention, and uses spinlocks for large allocations. MySQL exactly fits the definition, so just by using simple drop-in replacement you may achieve increased performance over standard libc implementations."

Domas' blog has further details.2013, By: Seo Master

Seo Master present to you: Just wanted to highlight a post from the Maps API blog regarding updated KML support in Google Maps:

We've now got a few more tricks that you can do with KML on Maps:

• View entire photo sets as self-contained KMZ files, as exported by Picasa. We were going to write up how it's done, but Brian's blog post pretty much covers it. Check out his geo-tagged photos of Mallory Cave.
  
• View KML Overlays. Add your own imagery directly on top of Maps. For example, take the GroundOverlay example from the official KML tutorial and just throw the photo of Mt. Etna onto Google Maps.
  
• Use your own customized marker icons.

To view a KML or KMZ file on Maps, just go to Google Maps, and instead of searching for a geographical address like 1600 Amphitheatre Parkway, 94043, search for a complete Web address (including the "http://" part) of your KMZ file, like http://kml.lover.googlepages.com/cropcircles.kmz. Need your own web space to upload some files? Try Google Page Creator.

The Maps API blog has further details.2013, By: Seo Master

Seo Master present to you: Post by L. Jean Camp, Associate Professor, Indiana University

Net Trust is a new approach to security being developed at Indiana University's School of Informatics, with funding from Google's Open Source Program Office and released under the Apache license. It is a trust mechanism, not a security mechanism. Net Trust is designed to undermine fraud and credential subversion that use human engineering (also called pretexting) by building interfaces that make use of humans' natural trust behaviors.

The goal is to leverage social trust for online trust, not to use technological mechanisms to create new modes of trust. Net Trust provides social and human solutions to their respective elements of masquerade attacks and human engineering.

Net Trust is in early development at Google Code and is available in demo mode. It can be downloaded and used, including warning boxes and the interaction experience, though the backend is not yet constructed. Please feel free to play with it and contribute!2013, By: Seo Master