mlr3mbo
mlr3mbo picked its defaults from a benchmark study, not from taste
Comparison · Analytics
bbotk vs crosstalk
A side-by-side editorial comparison of bbotk and crosstalk — release velocity, themes, recent moves, and the top alternatives to consider.
bbotk vs crosstalk: at a glance
What is bbotk?
bbotk is generalizing from an optimizer toolkit into an evaluation framework.
bbotk is the black-box optimization backend behind mlr3 tuning: search spaces, terminators, archives, and an async layer built on rush. Recent releases pair steady async-API buildout with removal of the deprecated arguments that preceded it. The 1.9.0 release introduced EvalInstance as a base class for OptimInstance, separating evaluating an objective from optimizing one.
What is crosstalk?
crosstalk is frozen infrastructure: four releases in five years, mostly CRAN upkeep.
crosstalk provides the shared-selection and filtering layer that lets independent htmlwidgets communicate on a page without Shiny. Its visible history is four releases across five years, one of which made a substantive change and three of which were fixes. The most recent exists only to clear an R CMD check NOTE.
bbotk vs crosstalk: editorial side-by-side
bbotk
2.5ANALYTICS
bbotk is generalizing from an optimizer toolkit into an evaluation framework.
◆ Current state
bbotk is the black-box optimization backend behind mlr3 tuning: search spaces, terminators, archives, and an async layer built on rush. Recent releases pair steady async-API buildout with removal of the deprecated arguments that preceded it. The 1.9.0 release introduced EvalInstance as a base class for OptimInstance, separating evaluating an objective from optimizing one.
◆ Where it's heading
Two threads run through the visible history. The first is async optimization maturing: ArchiveAsync gained a full push/finish/fail vocabulary over rush tasks in 1.11.0, and 1.12.0 deleted the deprecated extra arguments it replaced. The second is dependency consolidation, with custom C hypervolume code handed to moocore and rush pinned to 1.0.0, trimming maintenance surface as the async path becomes the default.
◆ Prediction
The deprecation removals in 1.12.0 suggest the async archive API is now treated as settled; the next releases most likely build on EvalInstance rather than continuing to churn ArchiveAsync.
crosstalk
0.0ANALYTICS
crosstalk is frozen infrastructure: four releases in five years, mostly CRAN upkeep.
◆ Current state
crosstalk provides the shared-selection and filtering layer that lets independent htmlwidgets communicate on a page without Shiny. Its visible history is four releases across five years, one of which made a substantive change and three of which were fixes. The most recent exists only to clear an R CMD check NOTE.
◆ Where it's heading
The package is finished in the sense that matters: it does one thing, widget authors depend on it, and it changes when R or CRAN forces it to. The single directional move here is 1.2.0 dropping the bundled Bootstrap dependency so crosstalk stops imposing a CSS framework on the pages that embed it. Nothing since suggests further design work.
◆ Prediction
The next release is most likely another CRAN-compliance fix; the entries show no feature work in progress.
Alternatives to bbotk and crosstalk
Other Analytics products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either bbotk or crosstalk.
loo
loo keeps rewriting the diagnostics Bayesian modellers read off model comparison
mlr3fselect
mlr3fselect turned feature selection into an asynchronous, distributable job
lime
lime survives on compatibility patches years after its research moment
mlr3measures
mlr3measures is systematically retrofitting sample weights across every metric
mlr3cluster
mlr3cluster went from a handful of clusterers to covering the field
See all bbotk alternatives → · See all crosstalk alternatives →
Recent activity from bbotk and crosstalk
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 24d agobbotkDeprecated extra argument removed from ArchiveAsync methods
- 1mo agobbotkArchiveAsync gains full push/finish/fail task API over rush
- 2mo agobbotkDominance and hypervolume computation moved to moocore
- 4mo agobbotkmlr_test_functions adds standard optimization benchmarks
- 5mo agobbotkEvalInstance base class separates evaluation from optimization ⚡
- 8mo agobbotkFix: conditions now work with OptimizerLocalSearch
- 11mo agocrosstalkRd link anchors fixed for R CMD check
- 2y agocrosstalkFixes for SharedData in Shiny modules and filter escaping
- 4y agocrosstalkBootstrap dependency dropped from filter and layout helpers
- 6y agocrosstalkClearer error when Shiny is not installed
Frequently asked questions
What is the difference between bbotk and crosstalk?
They serve adjacent needs but don't currently overlap on shipped themes. bbotk is currently shipping more aggressively (velocity 2.5 vs 0.0), with 0 editorial sparks in the last 30 days against 0. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is bbotk better than crosstalk?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. bbotk is currently shipping more aggressively (velocity 2.5 vs 0.0), with 0 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Analytics products to evaluate alongside.
What are the best alternatives to bbotk?
Top bbotk alternatives in Analytics are ranked by recent ship velocity. Browse the "bbotk alternatives" section above for the current picks, or visit /alternatives/bbotk for the full list with editorial commentary on each.
What are the best alternatives to crosstalk?
Top crosstalk alternatives in Analytics are ranked by recent ship velocity. Browse the "crosstalk alternatives" section above for the current picks, or visit /alternatives/crosstalk for the full list with editorial commentary on each.