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Amap Tech
Amap Tech
Mar 23, 2020 · Fundamentals

Performance Optimization of bsdiff for In‑Car Navigation OTA Updates

To enable fast, low‑memory OTA updates on resource‑constrained car head units, Amap’s team reengineered bsdiff by adopting a divsufsort‑based variant, adding a sliding‑window buffer, and swapping Bzip2 for lightweight RLE with secondary compression, reducing patch time to 3‑5 seconds and memory usage to about 2 MB.

Embedded SystemsOTA updatebinary diff
0 likes · 8 min read
Performance Optimization of bsdiff for In‑Car Navigation OTA Updates
Tencent Music Tech Team
Tencent Music Tech Team
Jun 6, 2016 · Mobile Development

Incremental Update Solution for Android APKs Using Binary Diff and Channel Management

The article presents an Android incremental‑update solution that uses bsdiff‑generated binary patches to replace full APK downloads, embeds channel identifiers in the ZIP comment field to avoid per‑channel APK duplication, and details server‑side patch creation, client‑side channel stripping, patch merging, and verification to reduce bandwidth and simplify multi‑channel distribution.

APK PatchAndroidChannel Management
0 likes · 18 min read
Incremental Update Solution for Android APKs Using Binary Diff and Channel Management