httpuv
httpuv ships almost nothing, which is what you want from the web server under Shiny
Comparison · DevOps
ASP.NET Core vs promises
A side-by-side editorial comparison of ASP.NET Core and promises — release velocity, themes, recent moves, and the top alternatives to consider.
ASP.NET Core vs promises: at a glance
What is ASP.NET Core?
ASP.NET Core's public feed is servicing traffic; the real work happens on the .NET 11 previews.
The repository ships on a predictable servicing rhythm — monthly patch rollups across the 8.0, 9.0, and 10.0 branches, dominated by branding bumps, dependency updates, and build-infrastructure work. User-visible changes are rare and concentrated in the 10.0 line, where Blazor fixes still land. The 11.0 preview tags appear separately and carry single commits rather than release notes.
What is promises?
promises drops R6 for plain environments and wires async work into OpenTelemetry
promises supplies the async primitives behind Shiny and plumber. After years of small domain and future() fixes, the last two releases changed both what a promise costs and what it can report: 1.4.0 corrected nested domain ordering and added the first OpenTelemetry integration, and 1.5.0 replaced the R6 promise class with a classed environment while stabilizing the tracing API.
ASP.NET Core vs promises: editorial side-by-side
ASP.NET Core
5.0DEVOPS
ASP.NET Core's public feed is servicing traffic; the real work happens on the .NET 11 previews.
◆ Current state
The repository ships on a predictable servicing rhythm — monthly patch rollups across the 8.0, 9.0, and 10.0 branches, dominated by branding bumps, dependency updates, and build-infrastructure work. User-visible changes are rare and concentrated in the 10.0 line, where Blazor fixes still land. The 11.0 preview tags appear separately and carry single commits rather than release notes.
◆ Where it's heading
Nothing in this feed suggests a directional shift: the 8.0 and 9.0 branches are in maintenance, 10.0 absorbs the remaining behavioral fixes, and 11.0 is accumulating previews one commit at a time. Recent servicing entries lean unusually heavily toward CI and internal feed authentication work — the team replacing expired PATs with build identity and moving pipelines to newer images. Read this feed for stability signals, not for product direction.
◆ Prediction
The cadence points to continued monthly servicing across all three branches, with .NET 11 preview tags accumulating until a preview release note consolidates them into something readable.
promises
0.0DEVOPS
promises drops R6 for plain environments and wires async work into OpenTelemetry
◆ Current state
promises supplies the async primitives behind Shiny and plumber. After years of small domain and future() fixes, the last two releases changed both what a promise costs and what it can report: 1.4.0 corrected nested domain ordering and added the first OpenTelemetry integration, and 1.5.0 replaced the R6 promise class with a classed environment while stabilizing the tracing API.
◆ Where it's heading
Two things are being fixed at once. Promise domains - the mechanism that carries context across async boundaries - have been the source of nearly every bug in this window, and they are now being used deliberately as the vehicle for tracing rather than just for error handling. Meanwhile the object itself is being made cheap enough to create in volume.
◆ Prediction
Expect the OpenTelemetry surface to lose its experimental label and pick up the same span coverage Shiny would need end to end; the deprecated ospan function names should be removed in a following release.
Alternatives to ASP.NET Core and promises
Other DevOps 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 ASP.NET Core or promises.
withr
withr rebuilt defer() on base R's own on.exit(), and got much faster for it
htmltools
htmltools spends three releases walking back its own fill-layout opinions
xml2
xml2 relicensed to MIT, then moved its hot accessors from S3 into C
httr
httr's last releases are housekeeping - the package now points users at httr2
magrittr
magrittr rewrote its pipe in C, then base R shipped one and the releases stopped
See all ASP.NET Core alternatives → · See all promises alternatives →
Recent activity from ASP.NET Core and promises
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoASP.NET Core.NET 9.0.19
- 1d agoASP.NET Core.NET 8.0.30
- 16d agoASP.NET Core.NET 11 preview 7: OpenAPI generation environment support
- 27d agoASP.NET Corev10.0.11: [release/10.0] Limit Microsoft.OpenApi to disallow next major (#67772)
- 29d agoASP.NET Core.NET 10.0.10
- 29d agoASP.NET Core.NET 9.0.18
- 9mo agopromisesOpenTelemetry spans across async work; R6 dropped for environments ⚡
- 9mo agopromisesNested promise domains fixed; then() gains a tee argument
- 1y agopromisesRealigns future object creation with the future package
- 1y agopromisesFixes stack overflow on long promise chains
- 1y agopromisesFixes domains forgotten inside nested handlers
- 3y agopromisesfuture_promise() returns early when workers are exhausted
Frequently asked questions
What is the difference between ASP.NET Core and promises?
They serve adjacent needs but don't currently overlap on shipped themes. ASP.NET Core is currently shipping more aggressively (velocity 5.0 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 ASP.NET Core better than promises?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. ASP.NET Core is currently shipping more aggressively (velocity 5.0 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 DevOps products to evaluate alongside.
What are the best alternatives to ASP.NET Core?
Top ASP.NET Core alternatives in DevOps are ranked by recent ship velocity. Browse the "ASP.NET Core alternatives" section above for the current picks, or visit /alternatives/aspnet-core for the full list with editorial commentary on each.
What are the best alternatives to promises?
Top promises alternatives in DevOps are ranked by recent ship velocity. Browse the "promises alternatives" section above for the current picks, or visit /alternatives/promises for the full list with editorial commentary on each.