How Baidu’s Dex Line‑Number Optimization Shrinks Android APKs by 8%

This article examines Android Dex DebugInfo line‑number optimization, detailing the structure of DebugInfo, existing solutions, Baidu’s mapping‑based approach, R8 and Alipay techniques, and the resulting APK size reduction, while also describing the end‑to‑end pipeline for line‑number retracing in production.

APKSizeReductionAndroidDEX

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How Baidu’s Dex Line‑Number Optimization Shrinks Android APKs by 8%

Baidu App Technology

Mar 28, 2022 · Mobile Development

Dex DebugInfo Line Number Optimization in Android Applications

The article explains how Baidu’s Dex line-number optimization replaces original line numbers with compact PC-based mappings, unifies debug_info_items, and uses a server-side mapping file to shrink DebugInfo by roughly 8% of the Dex size while keeping stack-trace line numbers fully recoverable.

AndroidDEXDebugInfo

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Dex DebugInfo Line Number Optimization in Android Applications