Replace decimal year conversions with julian year conversions. - #382
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sblunt wants to merge 19 commits into
Open
Replace decimal year conversions with julian year conversions.#382sblunt wants to merge 19 commits into
sblunt wants to merge 19 commits into
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semaphoreP
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Jun 16, 2026
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I think it generally looks good to me. Did you have a chance to run an HGCA orbit fit to see if it matches previous results?
This reverts commit c30d2e8.
Actually use pool in ptemcee
periodic_save_freq previously re-derived the entire chain history (including an unvectorized per-sample prior recomputation) and rewrote the whole HDF5 output file on every periodic save, making cost grow with total run length instead of just the new chunk. _update_chains_from_sampler now only processes steps since the last save, and Results.save_results appends to resizable HDF5 datasets instead of rewriting the file each time. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
… saves Results.add_samples() used np.vstack/np.append, which reallocate and copy the entire accumulated post/lnlike arrays on every call. This meant that even after the earlier fix to periodic_save_freq (only recomputing/writing new chunks), the in-memory accumulation itself was still O(total rows so far) per periodic save, making the MCMC fit progressively slower as it ran. add_samples now writes into a capacity-doubling internal buffer, so appends are amortized O(1) per row instead of O(n) per call. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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See issue #372. This doesn't have any big impact on the Hipparcos IAD refitting, but maybe it affects things on longer timescales (i.e. hipparcos-gaia). Will continue to investigate.