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perf(matchImei): replace O(N*M) nested ResultSet scan with HashMap lookup - #99
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sauravbhattacharya001 wants to merge 1 commit into
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sauravbhattacharya001 wants to merge 1 commit into
sauravbhattacharya001 wants to merge 1 commit into
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…okup Replace the nested-loop device matching (O(events × devices) per pass) with an in-memory HashMap for O(1) lookups per event row, reducing overall complexity to O(events + devices). Additional improvements: - Batch UPDATE statements (flush every 500) for fewer DB round-trips - Wrap both passes in a transaction with rollback on failure - Extract reusable matchAndUpdate() method to eliminate code duplication - Remove SCROLL_INSENSITIVE cursors (no longer needed without rs.first() rewind)
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Closing: superseded or conflicting with newer changes already on main/master. |
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Summary
Replace the nested-loop device matching in \matchImei.java\ with an in-memory HashMap for O(1) lookups.
Before
s_device\ to the first row and scanned linearly to find a match
After
s.first()\ rewind)