L1centrality
A graph-centrality package that spent 2026 making its existing measures usable at scale, then went quiet.
Comparison · Infra & APIs
lifecontingencies vs vdiffr
A side-by-side editorial comparison of lifecontingencies and vdiffr — release velocity, themes, recent moves, and the top alternatives to consider.
lifecontingencies vs vdiffr: at a glance
What is lifecontingencies?
An actuarial mainstay spends its releases on CI plumbing, not on new mathematics.
lifecontingencies is a long-running R package for actuarial life-contingency mathematics. Its three most recent tags show a maintainer keeping the infrastructure alive rather than extending the library: 1.5.2 is entirely author-metadata corrections, CI workflow repairs and release automation, 1.4.4 moved presentValue() onto Rcpp, and 1.4.1 states outright that it is identical to the version before it. The 1.5.2 notes jump from 1.4.4, so whatever happened in between never reached this feed.
What is vdiffr?
vdiffr finished its job in 2021 and has been tracking compilers ever since.
vdiffr generates deterministic SVG snapshots so plot changes show up as test failures. Its recent history is almost entirely toolchain: UCRT Windows compatibility twice, a revert to C++11 to work around a GCC issue, and renaming the internal SVG device so it stops colliding with svglite. The only functional additions in view are snapshot variants in 1.0.8 and a testthat fix so snapshots are no longer auto-deleted when a test errors or skips. The last release was October 2024.
lifecontingencies vs vdiffr: editorial side-by-side
lifecontingencies
2.5INFRA · APIS
An actuarial mainstay spends its releases on CI plumbing, not on new mathematics.
◆ Current state
lifecontingencies is a long-running R package for actuarial life-contingency mathematics. Its three most recent tags show a maintainer keeping the infrastructure alive rather than extending the library: 1.5.2 is entirely author-metadata corrections, CI workflow repairs and release automation, 1.4.4 moved presentValue() onto Rcpp, and 1.4.1 states outright that it is identical to the version before it. The 1.5.2 notes jump from 1.4.4, so whatever happened in between never reached this feed.
◆ Where it's heading
The one genuine engineering thread is performance: rewriting presentValue() in Rcpp targets the innermost loop of every annuity and insurance valuation the package performs. Everything since has been about keeping CRAN checks green across platforms — TinyTeX install order, cross-platform caching, automated release tagging — plus a set of Italian actuarial benchmark tests that pin results against published tables. That is maintenance discipline on a stable API, not expansion.
◆ Prediction
Expect further patch tags carrying CI and documentation work, with any Rcpp performance work extending from presentValue() into adjacent valuation functions if it continues at all.
vdiffr
0.0INFRA · APIS
vdiffr finished its job in 2021 and has been tracking compilers ever since.
◆ Current state
vdiffr generates deterministic SVG snapshots so plot changes show up as test failures. Its recent history is almost entirely toolchain: UCRT Windows compatibility twice, a revert to C++11 to work around a GCC issue, and renaming the internal SVG device so it stops colliding with svglite. The only functional additions in view are snapshot variants in 1.0.8 and a testthat fix so snapshots are no longer auto-deleted when a test errors or skips. The last release was October 2024.
◆ Where it's heading
The package reached its intended shape at 1.0.0, when snapshot management moved to testthat and vdiffr shed most of its own R and JavaScript code to become a reproducible SVG engine and nothing more. There is not much left to add to that, and the release stream since reads accordingly: it moves when a compiler, an R version, or testthat moves. For a testing dependency this is a healthy end state, though it does mean the package inherits whatever the graphics engine does to snapshot stability.
◆ Prediction
The entries do not support predicting a feature release. The likely next change is a compatibility fix prompted by a compiler or a testthat change, as every release since 1.0.2 has been.
Alternatives to lifecontingencies and vdiffr
Other Infra & APIs 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 lifecontingencies or vdiffr.
exametrika
A test-theory package that grew into a graphical-model toolkit, now spending its releases paying down the API debt that growth created.
nuggets
nuggets keeps compounding on the 2.0 rewrite — more pattern families, lighter install.
projoint
projoint spent a year on CRAN paperwork, then shipped a correctness fix it flagged itself.
eratosthenes
eratosthenes spends 0.1.0 hardening inputs rather than adding chronology methods.
dqcheckr
dqcheckr adds drift analysis, then removes the YAML a user had to hand-write.
See all lifecontingencies alternatives → · See all vdiffr alternatives →
Recent activity from lifecontingencies and vdiffr
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agolifecontingenciesCI and metadata work; Italian actuarial benchmark tests added
- 8mo agolifecontingenciespresentValue() moves to Rcpp
- 11mo agolifecontingenciesTag identical to the previous version
- 1y agovdiffrSnapshot variants supported
- 2y agovdiffrRevert to C++11 for a GCC workaround
- 2y agovdiffrRename internal SVG device to avoid svglite collision
- 4y agovdiffrUCRT Windows compatibility under Rtools42
- 4y agovdiffrUCRT Windows compatibility
- 5y agovdiffrSnapshots survive errored and skipped tests
Frequently asked questions
What is the difference between lifecontingencies and vdiffr?
They serve adjacent needs but don't currently overlap on shipped themes. lifecontingencies 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 lifecontingencies better than vdiffr?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. lifecontingencies 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 Infra & APIs products to evaluate alongside.
What are the best alternatives to lifecontingencies?
Top lifecontingencies alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "lifecontingencies alternatives" section above for the current picks, or visit /alternatives/lifecontingencies for the full list with editorial commentary on each.
What are the best alternatives to vdiffr?
Top vdiffr alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "vdiffr alternatives" section above for the current picks, or visit /alternatives/vdiffr for the full list with editorial commentary on each.