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Liang Ma | Software Engineer, App FoundationsIn early 2020, we started seeing significantly elevated out-of-memory (OOM) crashes in the Pinterest iOS app. That incident resulted in a declined Crash-Free Users Rate (CFUR), from the previous 99% to 96%, which was a steep drop. What was going on?We improved many systems along the journey, but those learnings could be a separate blog post. The primary focus of this blog post is to share with the broader iOS community what we have learned through thi...