Korean stemmer benchmarks
Benchmark-only dictionary — not distributed
ko-kr-default is privately retained for reproducible measurement only. Radixor does not distribute, install, publish, register, or support this dictionary because file-applicable redistribution rights are unresolved. It has no Maven coordinates, BOM/catalog entry, standard-package membership, or Python package.
Evidence: Selected data file lacks file-applicable license evidence. Benchmarking these private bytes does not assert a right to redistribute them.
Dictionary size: . The exact count is 192,673 distinct usable word forms after parser-compatible filtering and exact case-preserved deduplication. Stars rank size among all 167 benchmarked dictionaries; they do not measure linguistic quality, availability, or benchmark accuracy.
The corpus, quality, generalization, and speed evidence below belongs to the private 2026-09-11 Radixor/Java 4.4.0 documentation snapshot. It is never placed on a production or release classpath.
Dictionary corpus
| Model ID | Private version | Language | Dictionary rows | Distinct usable forms | Complete tokens | Already-root | Changed | Timing workload | Timing tokens |
|---|---|---|---|---|---|---|---|---|---|
ko-kr-default |
1.0.0 |
KO_KR |
2,672 | 192,673 | 196,302 | 5,344 | 190,958 | changed tokens | 190,958 |
Radixor patch-command distribution
| Command class | Complete-corpus forms |
|---|---|
AppendCharacterCommand |
247 |
BackwardCompoundCommand |
166,837 |
DeleteSuffixCommand |
6 |
PreserveCommand |
5,346 |
ReplaceLastCharacterCommand |
23,866 |
Exact-root accuracy
| Stemmer | All exact | Changed exact | Root preserved |
|---|---|---|---|
| Private Radixor filesystem model | 99.512% | 99.499% | 99.963% |
Pairwise linguistic quality
OI and UI report over-stemming and under-stemming with raw numerators and denominators. A zero denominator is n/a.
| Stemmer | Dictionary mode | OI raw | OI | UI raw | UI |
|---|---|---|---|---|---|
| Private Radixor filesystem model | ALL_WORDS |
0 / 18554200635 | 0.000000% | 29214 / 7145493 | 0.408845% |
| Private Radixor filesystem model | LOWERCASE_GROUPS_ONLY |
0 / 18554200635 | 0.000000% | 29214 / 7145493 | 0.408845% |
Dictionary-family generalization
This frozen five-seed curve measures transfer to withheld lexical families; it does not establish redistribution or support status.
| Training rows | Median unseen occurrences | Unseen all exact | Unseen changed exact | Unseen root preserved |
|---|---|---|---|---|
| 10% | 176,512 | 81.085% | 80.561% | 99.792% |
| 20% | 156,840 | 81.037% | 80.512% | 99.766% |
| 30% | 136,808 | 82.501% | 82.016% | 99.786% |
| 40% | 117,008 | 81.947% | 81.444% | 99.813% |
| 50% | 97,497 | 82.828% | 82.353% | 99.775% |
| 60% | 78,230 | 83.945% | 83.502% | 99.719% |
| 70% | 58,487 | 82.242% | 81.745% | 99.625% |
| 80% | 38,779 | 81.688% | 81.167% | 99.812% |
| 90% | 19,450 | 82.959% | 82.480% | 100.000% |
| 100% | 0 | n/a | n/a | n/a |
Runtime timing
JMH average time uses 3 one-second warmup iterations, 5 one-second measurement iterations, 3 independent forks, and 1 thread.
| Benchmark | Score ms/op | Error ms | ns/token |
|---|---|---|---|
| Private Radixor filesystem model | 21.239 | 3.762 | 111.2 |