Spaces:
Running
title: Time Series Compression Benchmark
emoji: 📊
colorFrom: green
colorTo: gray
sdk: static
app_file: index.html
pinned: false
short_description: Compression rates and compress/decompress costs
THULab Compression Benchmark
The active test scope contains 137 datasets and 85 active C++ method families. The user selected a uniform rule: exclude datasets with fewer than 128 valid values on average per numerical column/entity sequence; retain datasets at exactly 128. Compression performance does not participate in this selection. Timestamp-only medium_posts is separately ineligible because its scientific input contract excludes timestamps and admits no numerical value payload; its mean is undefined, not zero. The previous 160 scope and raw 164 archive remain preserved in Git history and the immutable result files.
final-dataset-scope.json and sequence-length-audit.json freeze the exact identities and length evidence. The active catalog retains 2 corrected-input retests pending; currently 135 dataset identities contribute numeric Overall measurements. Superseded incomplete inputs are excluded across C++, Java, Python and all dtype slices, without older fallback. Input and retest status is in final-input-status.json.
C++ selects the latest receipt-bound authority per dataset and canonical method. Its active comparison is restricted to the 85 method contract; two extra historical methods remain in raw downloads. Java/Python retain their published source profiles. Numeric dtype-specific results, terminal N/A, unsupported and retest-pending states remain distinct. Overall method cells contain only the method/configuration name; details explain coverage and retain provenance. CSV includes source hosts, support sets, timing admission and the active scope.
Compression rate remains complete compressed-frame bytes divided by original numeric binary bytes. The three shared CSV metadata files are not added to the compressed numerator. No ratio is inverted, clipped or altered. ranking.js is unchanged. The latest C++ view imports the completed server-192 main26 campaign plus four exact-disjoint Camel recovery selections: 3,510 dataset-method conclusions across 135 measured datasets (within the 137-dataset catalog and 85 active-family contract), comprising 1,529 full-support, 629 partial-support and 1,352 unsupported conclusions and 4,037 numeric Overall/integer/float scope rows. Compression and decompression timing uses the same-host W1/R3/T1 contract; compression bytes are complete NGF1 frames per input block, and every measured ok frame passed built-in bit-exact Block equality outside the timed interval. This does not claim independent fresh-process verification. No cross-host timing is mixed in the new rows. Updated raw compact results, the publication manifest and source-selection evidence are bound by the Main26 receipts. To keep the append-only Space below its storage limit, the canonical full result snapshot is published as a deterministic Brotli transport, while the UI snapshot and latest-view sidecar use deterministic gzip transports; compressed and decompressed SHA-256 values are frozen. The earlier data.json, data-main26.json.gz, ui-data.json, and cpp-latest-view.json objects remain immutable historical artifacts. The latest page reads ui-data-uniform675.json.gz and the SHA-verified cpp-latest-view-main26.json.gz sidecar, while its snapshot download points to data-main26.json.br. Cross-host/campaign timing is not pooled into strict rankings; admitted timed subsets remain explicitly labeled and do not enter strict composite scores.
Historical operator byte effects are retained as diagnostics. Current-scope, corrected-input operator results remain pending and must be independently accepted before replacing them. Dataset corrections are documented in FINAL160_FORMAT_AUDIT.json; its previous 160-dataset investigation is a historical parent-scope audit, not the active selection list.
The historical 164×85=13,940 terminal matrix remains downloadable and is not a current-scope completion claim. Parent documentation preserves the previous pipeline and provenance.
DSC2 BOS/REGER reuse
The latest C++ view additionally replaces exactly 24 formerly partial BOS/REGER pairs over 12 datasets. Repaired float columns use the DSC2 v2 route; successful integer columns retain their Main26 route. All work ran on server 192 under the staged W1/R3/T1 contract (three encode measurements followed by three decode measurements), with precision derived once per float method-column and built-in complete Block bit-exact checks. Composite rows retain every binary, terminal, profile and source route; no scalar binary identity is invented.
Completed lossless recovery
This release appends 3915 dtype-scope rows and replaces exactly 1,688 latest C++ pair decisions from the completed integer89 and native15 campaigns. All measurements ran on server 192 with W1/R3/T1 and built-in exact complete-Block checks. Historical rows and the prior DSC2 release remain unchanged.
Improved lossless BUFF/CORAD variants
This release appends 626 dtype-scope rows and replaces exactly 270 latest C++ pair decisions with the completed BUFF-v2 and CORAD exact-repair variants. The earlier native variants and every unrelated result remain in append-only history. Measurements use server 192, W1/R3/T1, and built-in exact complete-Block checks.
Uniform server192 five-method remeasurement
This release appends 1565 dtype-scope rows and replaces exactly 675 latest C++ pair decisions with the completed uniform CSC, LZJB, LZSSE, Shrinker, and Tornado remeasurement. The earlier native variants and every unrelated result remain in append-only history. Measurements use server 192, W1/R3/T1, and built-in exact complete-Block checks.
Uniform-five675 transport decoding
The Brotli file expands to the exact canonical full JSON identified in manifest.json. For example: python3 -c "import brotli,sys; sys.stdout.buffer.write(brotli.decompress(open('data-main26.json.br','rb').read()))" > data-main26.json. The browser uses DecompressionStream('gzip') for ui-data-uniform675.json.gz; the page verifies both compressed and decompressed SHA-256 values before parsing.