The DeWu Tech article dissects iOS’s dyld BuildingClosure stage, shows how hash‑collision‑laden selector strings inflate its runtime, and demonstrates that renaming the colliding selectors reduces perfect‑hash iterations, cutting the phase’s duration by roughly 80% and noticeably speeding up app startup.
Baidu’s iOS solution monitors single memory allocations exceeding an 8 MB threshold by intercepting malloc_logger and capturing stack traces with backtrace, merging online user‑scenario data and offline pipelines to identify large‑allocation hotspots, reduce OOM crashes, and give developers actionable debugging insight.
This article explains how an iOS/macOS application is launched, detailing the interaction between dyld and the Objective‑C runtime, the initialization steps performed by _objc_init, and the series of functions such as environ_init, static_init, map_images, read_images, and load_images that together realize classes, selectors, protocols and +load methods before main() is called.
This article explains how the Haishen platform collects iOS crash logs, uses KSCrash to capture rich crash context, overcomes background‑session upload limitations, extracts system symbol tables from firmware, and implements a fast, JSON‑based crash‑symbolication pipeline using atos while handling symbolicatecrash bugs.
This article explains the iOS app launch process, breaks down dyld's loading stages, proposes concrete optimizations for dynamic libraries, rebasing, Objective‑C setup, and main‑thread work, and shows how these changes achieve roughly a 40% reduction in startup time on an iPhone 8.
This article introduces the macOS vmmap utility, explains why a lightweight version was re‑implemented for iOS, and details the step‑by‑step code that obtains task handles, region data, dyld image information, formats and prints memory maps to aid reverse‑engineering on iOS devices.
This article explains how to measure, analyze, and dramatically improve iOS app launch performance through profiling, removing unused code, compressing assets, and restructuring view controller loading, illustrated with a real‑world WiFi manager case study.
