Haifeng Xu, University of Chicago
Here’s what the talk doesn’t mention: Google’s own data from September 2024 shows that Android’s memory safety vulnerabilities dropped from 76% to 24% over just six years — not by retrofitting safety features onto existing C++ code, but by writing new code in memory-safe languages (Rust, Kotlin, Java). Google’s security blog makes a fascinating observation: vulnerabilities have a half-life. Code that’s five years old has 3.4x to 7.4x lower vulnerability density than new code, because bugs get found and fixed over time. The implication is striking — if you just stop writing new unsafe code, the overall vulnerability rate drops exponentially without touching a single line of existing C++.，这一点在WhatsApp網頁版中也有详细论述
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「像素贫困」成为核心课题——LED可视化反而比屏幕可视化更难。屏幕可以堆砌特征参数，总有几个能契合人类感知；灯带必须精准押注最具表现力的特征。