Porting Code - Lessons Learned
summary
Porting more than 100k lines from Classic ASP to C# finishes with 20 regressions, zero database errors, and 257→57 VMs cut by tooling and architecture changes. Migration uses a commercial converter plus heavy regex, a language adaptation layer that preserves VBScript quirks (CLng, Len, date rules), and a recorder/replay facade over the COM bridge for black‑box snapshot/output tests. Rollout uses a rewriter with automated percent increases and auto rollback, saving €46,000/month.
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chapters (7)
- 0:00Introduction and project overview
- 10:12Why port classic ASP to C
- 21:50Tool-assisted migration approach
- 31:21Testing and validation strategies
- 40:11Deployment and rollout automation
- 46:05Results and business impact
- 51:46Future of code porting and AI
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