Simon Willison’s Weblog

Items tagged facebook in 2020

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The open secret Jennings filled me in on is that OpenStreetMap (OSM) is now at the center of an unholy alliance of the world’s largest and wealthiest technology companies. The most valuable companies in the world are treating OSM as critical infrastructure for some of the most-used software ever written. The four companies in the inner circle— Facebook, Apple, Amazon, and Microsoft— have a combined market capitalization of over six trillion dollars.

Joe Morrison # 20th November 2020, 9:11 pm

CG-SQL (via) This is the toolkit the Facebook Messenger team wrote to bring stored procedures to SQLite. It implements a custom version of the T-SQL language which it uses to generate C code that can then be compiled into a SQLite module. # 22nd October 2020, 6:25 pm

Project LightSpeed: Rewriting the Messenger codebase for a faster, smaller, and simpler messaging app (via) Facebook rewrote their iOS messaging app earlier this year, dropping it from 1.7m lines of code to 360,000 and reducing the binary size to a quarter of what it was. A key part of the new app’s architecture is much heavier reliance on SQLite to coordinate data between views, and to dynamically configure how different views are displayed. They even built their own custom system to add stored procedures to SQLite so they could execute portable business logic inside the database. # 22nd October 2020, 6:22 pm

A manager on Strategic Response mused to myself that most of the world outside the West was effectively the Wild West with myself as the part-time dictator – he meant the statement as a compliment, but it illustrated the immense pressures upon me.

Sophie Zhang # 15th September 2020, 9:21 pm

“I Have Blood on My Hands”: A Whistleblower Says Facebook Ignored Global Political Manipulation (via) Sophie Zhang worked as the data scientist for the Facebook Site Integrity fake engagement team. She gave up her severance package in order to speak out internally about what she saw there, and someone leaked her memo to BuzzFeed News. It’s a hell of a story: she saw bots and coordinated manual accounts used to influence politics in countries all around the world, and found herself constantly making moderation decisions that had lasting political impact. “With no oversight whatsoever, I was left in a situation where I was trusted with immense influence in my spare time". This sounds like a nightmare—imagine taking on responsibility for protecting democracy in so many different places. # 15th September 2020, 9:11 pm

Pysa: An open source static analysis tool to detect and prevent security issues in Python code (via) Interesting new static analysis tool for auditing Python for security vulnerabilities—things like SQL injection and os.execute() calls. Built by Facebook and tested extensively on Instagram, a multi-million line Django application. # 7th August 2020, 8:50 pm

Announcing Daylight Map Distribution. Mike Migurski announces a new distribution of OpenStreetMap: a 42GB dump of the version of the data used by Facebook, carefully moderated to minimize the chance of incorrect or maliciously offensive edits. Lots of constructive conversation in the comments about the best way for Facebook to make their moderation decisions more available to the OSM community. # 12th March 2020, 11:44 am