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Add excel-export module: Apache POI 6.0.0 XSSF vs SXSSF under a fixed heap, 1,000,000 rows streamed with StreamingResponseBody, OpenCSV, sheet rolling, temp-file cleanup

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Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_017ic4b4VQVEJWetTT1dYzyJ
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asmhatre
2026-10-29 06:18:42 +00:00
co-authored by Claude Sonnet 5.5
parent bded24d929
commit 9b1da079c6
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excel-export/output/09-compress-temp.txt
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# compressTempFiles on a 1,000,000-row SXSSF export, 64 MB heap
# openjdk version "25.0.5" 2026-10-20 LTS | 2 vCPU | 8027 MB RAM
# indicative numbers from a shared sandbox, one run per line; see README
SXSSF /export/sxssf?rows=1000000&compress=false Xmx=64m http=200 curl=0 bytes=59408766 37.1s | peak used heap 55 MB | max after GC 19 MB | 169 GC pauses, longest 54 ms | peak RSS 209 MB | temp dir peak 475 MB, files left 0 | OOM=no
SXSSF /export/sxssf?rows=1000000&compress=true Xmx=64m http=200 curl=0 bytes=59408766 57.4s | peak used heap 56 MB | max after GC 22 MB | 168 GC pauses, longest 37 ms | peak RSS 208 MB | temp dir peak 56 MB, files left 0 | OOM=no