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* perf(clickhouse): enable LZ4 client compression on inserts Closes #909 Local bench (loopback CH, 500k rows × ~700B JSON): - wall-clock: 3,223ms → 1,130ms (−65%) - wire bytes: 408MB → 39MB (10× smaller) - throughput: 155k → 442k rows/s LZ4 is the clickhouse-go maintainers' default recommendation — fast compress/decompress, negligible CPU. ZSTD compresses ~3× better but its higher CPU cost erases the wall-clock win on the native protocol; LZ4 is the right pick for event-shaped JSON payloads. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * chore(bench): add clickhouse compression bench Reproduces the LZ4-vs-ZSTD-vs-off comparison from #911 against any CH instance. Self-contained — creates and drops its own throwaway table. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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