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bindings: fewer JPype crossings on a short read (one nextRows call, scalar parameters without the conversion walk) (#213) - #214
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… closes the drained result set (to_list no longer asks twice) RowAccess.nextRows and RowBatcher.nextJsonBatch return fewer rows than asked for only when the result set is drained, so they now close it before returning, and Python stops after a short batch: to_list() made a second nextRows call just to see an empty batch (the same extra crossing #144 removed from to_json_list()), and every drained result set cost one more crossing for close(). A JPype call is 3 to 4 microseconds, a fifth of a one-row read. Measured on the benchmark's own read shapes (src/ab_reads.py, official 26.10.1 jars, interleaved A/B, 13 runs per arm, cores 6-7 of a laptop shared with other jobs, every run flagged by the throttle and swap-in checks, so ratios only): the documents lane's SELECT by key through to_list() 0.83x [0.80, 0.89], p=0.0003; the same read through first().get() 0.90x. The l2 bound Cypher read through to_json_list() 0.92x [0.81, 1.06], p=0.38: not significant at 13 runs. Tests: counting stand-ins for the bridge classes show one nextRows and one nextJsonBatch for a short result, two for an exact batch; a JPype proxy of the Java ResultSet shows the bridge closes what it drains and leaves a result with rows alone; Python makes no close() call; the RID-paging tests (arcadedb ArcadeData#8594) still finish. Four of the nine new tests fail on the old code. Full bindings suite on the official 26.10.1 jars with the two changes of this branch: 815 passed, 3 skipped, 9 xfailed. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Ubz3m6QXHESerCkehC1qgi
…n walk A dict of str keys whose values are plain scalars (int, float, str, bool, None, exact types), or positional scalars, now becomes a HashMap or an Object[] directly. JPype boxes them exactly as the general path boxed its unchanged values; numpy scalars, Decimal, dates, lists and subclasses of int keep the general path. Database._java_parameters cost 6.5 us for a one-key dict and 7.2 us for three positional values; it is 5.0 and 5.6 now (0.79x and 0.78x, 13 interleaved runs per arm, p<0.0001), on statements that are 15 to 60 us in all. Tests: a spy on convert_python_to_java sees no call for scalar parameters (the dict test fails on the old code), the same answers for every scalar type including 2**40 and null, and the general path is still taken for Decimal, lists, int subclasses and numpy scalars. Full bindings suite: 815 passed, 3 skipped, 9 xfailed. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Ubz3m6QXHESerCkehC1qgi
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The bindings 26.10.1 release (629b242), #214 (fewer JPype crossings on a short read: RowAccess.nextRows and RowBatcher.nextJsonBatch, scalar parameters bound without the conversion walk), #216 (docs, CI summary, scripts), the pruned foreign .github file, and upstream engine syncs. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Ubz3m6QXHESerCkehC1qgi
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…of bindings #214; row 63 names the wheel by the tree it is built from Bindings #214 (fewer JPype crossings on a short read, scalar parameters bound without the conversion walk) landed on main after the re-pin wheel was first built, and the bindings 26.10.1 release was cut before it and before the columnar insert. The wheel the stages bake is therefore a laptop build from this tree over the official jars, version 26.10.1, rebuilt after the merge of origin/main (abd7319): row 74 records what it carries, its size and sha256, the commit it was built from, that it is not the PyPI file, and that the re-pin's ArcadeDB embedded rows are not comparable with October's at the call-overhead level. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Ubz3m6QXHESerCkehC1qgi
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Fixes #213.
RowAccess.nextRowsandRowBatcher.nextJsonBatchreturn fewer rows than asked for only when the result set is drained, so they now close it before returning and Python stops after a short batch:to_list()no longer asks a second time for an empty batch (the same extra crossing #144 removed fromto_json_list()), and a drained result set no longer costs one more crossing forclose(). Scalar parameters (a dict of str keys with exact int, float, str, bool, or None values, or positional scalars) become aHashMapor anObject[]directly; numpy scalars,Decimal, dates, lists, and subclasses of int keep the general path.Measured on the official 26.10.1 jars, interleaved, 13 runs per arm, ratios only (a laptop shared with other jobs): a documents SELECT by key through
to_list()0.83x [0.80, 0.89], p=0.0003;_java_parameters0.79x for one key and 0.78x for three positional values, p<0.0001. The bound Cypher read throughto_json_list()is 0.92x [0.81, 1.06], not significant. No detectable effect on a whole new-order or payment transaction.Tests: counting stand-ins show one
nextRowsand onenextJsonBatchfor a short result and two for an exact batch; a JPype proxy shows the bridge closes what it drains and leaves a result with rows alone; a spy onconvert_python_to_javasees no call for scalar parameters and the answers are the same for every scalar type; the RID-paging tests (arcadedb ArcadeData#8594) still finish. The full bindings suite on the official 26.10.1 jars gave 815 passed, 3 skipped, 9 xfailed before #208 removed the skips.Do not merge before the 26.10.1 release is pushed to main.
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