dotnet/roslyn

Windows PDB: Improve reusal of imports scopes

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#18,004 建立於 2017年3月20日

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描述

When emitting Windows PDB the compiler doesn't reuse import scopes as much as it could. It currently deduplicates import scopes between two subsequent methods but not across all methods in the compilation. When emitting Portable PDB the scopes are deduplicated across the entire compilation. We can use the same logic to do so for Windows PDBs as well.

Once fixed enable skipped PDB conversion tests refering to this issue.

貢獻者指南

技術棧
csharp
領域
backendperformance
議題類型
feature
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
4
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
3-5 days
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
C#PDB formatRoslyn compiler internals
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
20
研究方向
Investigate the existing import scope deduplication logic used for Portable PDB emission. The logic likely resides in the PDB writer or emit step. Then apply similar deduplication to Windows PDB emission. Check the skipped PDB conversion tests that reference this issue to enable them after fix.