tempo
proposal-explicit-resource-managemen | tempo | |
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10 | 7 | |
- | 3,644 | |
- | 1.9% | |
- | 9.7 | |
- | 1 day ago | |
Go | ||
- | GNU Affero General Public License v3.0 |
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proposal-explicit-resource-managemen
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OpenTelemetry in 2023
In addition to this, is the new (stage 3 even!)explicit resource management proposal[0], supported by TypeScript version >= 5.2[1]
Though I agree that async context is better fit for this generally, the RMP should be good for telemetry around objects that have defined lifetime semantics, which is a step in the right direction you can use today
[0]: https://github.com/tc39/proposal-explicit-resource-managemen...
[1]: https://www.totaltypescript.com/typescript-5-2-new-keyword-u...
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TypeScript 5.2's New Keyword: 'using'
There's a conversation I had with Ron Buckton, the proposal champion, mainly on this specific issue. [1]
Short answer: Yes, Disposable can leak if you forget "using" it. And it will leak if the Disposable is not guarded by advanced GC mechanisms like the FinalizationRegistry.
Unlike C# where it's relatively easier to utilize its GC to dispose undisposed resources [2], properly utilizing FinalizationRegistry to do the same thing in JavaScript is not that simple. In response to our conversation, Ron is proposing adding the use of FinalizationRegistry as a best practice note [3], but only for native handles. It's mainly meant for JS engine developers.
Most JS developers wrapping anything inside a Disposable would not go through the complexity of integrating with FinalizationRegistry, thus cannot gain the same level of memory-safety, and will leak if not "using" it.
IMO this design will cause a lot of problems, misuses and abuses. But making JS to look more like C# is on Microsoft's agenda so they are probably not going to change anything.
[1]: https://github.com/tc39/proposal-explicit-resource-managemen...
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Douglas Crockford: “We should stop using JavaScript”
I'm not _entirely_ sure which RAII you mean, but if you mean something like C#'s `using` or Java's `try-with-resources` or Python's `with`, then https://github.com/tc39/proposal-explicit-resource-managemen... and https://github.com/tc39/proposal-async-explicit-resource-man... are in stage 3 (of 4 stages) in ECMAScript's language proposal lifecycle and will be coming to a JS engine near you behind a flag soon-ish.
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I love building a startup in Rust. I wouldn't pick it again
I'd prefer something with a more sound type system, and something that makes cleaning up resources easier and more ergonomic.
This might help with cleanup: https://github.com/tc39/proposal-explicit-resource-managemen...
But I'm not sure anything will help with the type system. For example, this drives me absolutely insane: https://www.typescriptlang.org/play#code/MYewdgziA2CmB00QHMA...
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Go runtime: 4 years later
There's a proposal for syntax to help with this in JS, incidentally: https://github.com/tc39/proposal-explicit-resource-managemen...
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Why Is C Faster Than Java (2009)
There is no reason why you could not, in principle, have Rust-style compile-time borrow checking in a managed language.
As an extreme example (that I have occasionally thought about doing though probably won't), you could fork TypeScript and add ownership and lifetime and inherited-mutability annotations to it, and have the compiler enforce single-ownership and shared-xor-mutable except in code that has specifically opted out of this. As with existing features of TypeScript's type system, this wouldn't affect the emitted code at all—heap allocations would still be freed nondeterministically by the tracing GC at runtime, not necessarily at the particular point in the program where they stop being used—but you'd get the maintainability benefits of not allowing unrestricted aliasing.
(Since you wouldn't have destructors, you might need to use linear instead of affine types, to ensure that programmers can't forget to call a resource object's cleanup method when they're done with it. Alternatively, you could require https://github.com/tc39/proposal-explicit-resource-managemen... to be used, once that gets added to JavaScript.)
Of course, if you design a runtime specifically to be targeted by such a language, more becomes possible. See https://without.boats/blog/revisiting-a-smaller-rust/ for one sketch of what this might look like.
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Deno Joins TC39
Things like https://github.com/tc39/proposal-explicit-resource-managemen.... Essentially better language level support for objects which represent some IO resource that should be reliably closed when a user is done with it. Something like the `defer` statement in Go is really missing from JS.
tempo
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OpenTelemetry in 2023
Grafana Tempo also switched from Protobuf storage format to Apache Parquet last year. It's fully open source, and the proposal is here: https://github.com/grafana/tempo/blob/main/docs/design-propo...
disclosure: I work for Grafana!
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Monitoring and Testing Cloud Native APIs with Grafana
By combining Grafana Tempo with Tracetest, you can create a robust solution for monitoring and testing APIs with distributed tracing.
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Introducing Tempo: low latency, cross-platform, end-to-end typesafe APIs
Last point: There's already a major open source project in the backend space called Tempo. You may want to reconsider the name.
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Waffles, Fries, Beer and Developers; Notes from FOSDEM 2023
I started the day with some Rust and spent the rest of the day in the Monitoring and Observability DevRoom. Most of the talks I attended were about OpenTelemetry and were very Grafana Labs-heavy. I knew Grafana and, to a less extent, Loki, and I had never seen Tempo (distributed tracing) and Phlare (profiling), and Mimir (backend for metrics, more backend-y than Prometheus?).
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Thoughts on Opentelemetry?
Grafana Tempo yes. Integrates seamlessly with Grafana (the dashboarding)
What are some alternatives?
search-benchmark-game - Search engine benchmark (Tantivy, Lucene, PISA, ...)
jaeger - CNCF Jaeger, a Distributed Tracing Platform
librope - UTF-8 rope library for C
blog - SZÉKELYDATA | Erdély, Székelyföld és a nagyvilág a Big Data korszakában
terraform-aws-jaeger - Terraform module for Jeager
jaeger-client-go - 🛑 This library is DEPRECATED!
zipkin-api-example - Example of how to use the OpenApi/Swagger api spec
mimir - Grafana Mimir provides horizontally scalable, highly available, multi-tenant, long-term storage for Prometheus.
semantic-conventions - Defines standards for generating consistent, accessible telemetry across a variety of domains
SwiftyTimer - Swifty API for NSTimer
SharpLab - .NET language playground
apm-server - APM Server