Sentry SDK for Java and Android Files

Behavioral Changes

• Collections returned by scope (e.g. getBreadcrumbs, getTags, getAttachments) are shared state and should not be mutated. (#5541)
• Previously, when going through CombinedScopeView, we were returning a copy where mutations didn't show up in the underlying scopes.
• This has now changed in order to reduce SDK overhead.
• Date objects returned by SDK data model getters are shared state and should not be mutated. (#5603)
• Previously, these getters returned defensive copies for some date fields.
• This has now changed in order to reduce SDK overhead.

Performance

• Reduce writer buffer size from 8192 to 512 (#5544)
• Remove redundant event map copies (#5536)
• Optimize combined scope by adding an early return if only one scope has data (#5541)
• Reduce model access overhead by avoiding defensive Date copies in SDK data model getters. (#5603)
• Reduce timestamp parsing and formatting overhead with Sentry-specific ISO-8601 handling. (#5602)
• Reduce JSON serialization overhead by creating the reflection serializer only when unknown-object fallback serialization is needed. (#5601)
• Reduce JSON serialization overhead by allocating reflection cycle-tracking state only when reflection serialization is used. (#5600)
• Reduce context serialization overhead by sorting key snapshots with arrays instead of temporary lists. (#5599)
• Reduce breadcrumb allocation overhead by creating the Breadcrumb data map only when data is added. (#5598)
• Reduce JSON serialization overhead by lowering the initial JsonWriter nesting stack size while preserving on-demand growth. (#5591)
• Reduce timestamp helper overhead by replacing unnecessary Calendar usage in DateUtils with direct Date creation. (#5589)
• Reduce Android startup overhead by using the default timezone directly on older devices or when no timezone info is available in the locale. (#5587)