No matter what you think of a computer language, you ought to respect its idioms for the same reason one has to know idioms in a human language—they facilitate communication, which is the true purpose of all languages, programming or otherwise.
— George V. Neville-Neil
George also explains that “a single cache miss is more expensive than many instructions, so optimizing away a few instructions is not really going to win your software any speed tests”.
LWN covers the new W3C spec for HTML subresource integrity (SRI):
SRI is designed to combat injection attacks that come through third-party content. The originating site can include cryptographic hashes of third-party script and image files, enabling the user’s browser to hash the corresponding files it receives from the third-party servers and verify that the hashes match.
Most browsers already support SRI, including Firefox, Chrome and Opera.