Jane Street Magic-Trace

• magic-trace

  29 4,432 6.9 OCaml

  magic-trace collects and displays high-resolution traces of what a process is doing

  

We are similarly sad about how unavailable Intel PT is in VMs. In 2022, being unavailable on Macs and VMs raises the barrier to entry extraordinarily high for many people in our target audience. Not sure if working outside of work is your cup of tea, but we've found Intel NUCs to be <$1000 and an unobtrusive way to play with these features at home.

Good point about overhead. I've moved the 2%-10% number front and center, and wrote up a bit more detail about where that comes from in a new wiki page: https://github.com/janestreet/magic-trace/wiki/Overhead

We'll think about adding flame graphs. We unfortunately have little experience writing responsive web UIs, the excellent Perfetto developers did all of the heavy lifting on that front. But who knows, maybe an enterprising Open Source Contributor could help us out. I see Matt Godbolt was asking questions in their discord the other day...

• perfetto

  1 26 0.0 C++

  Frontend for magic-trace; forks https://ui.perfetto.dev

  

You should make it more clearer in the Readme that the UI service fork used for viewing and analyzing the traces is also available should one want to deploy it locally or in a siguation without Knternet access:

https://github.com/janestreet/perfetto/

It is mentioned in the documentatiom but for anyone quickly skimming and expecting a SaaS pricing model underneath (I think many do now), that isn't obvious. From my initial scroll through this wasn't obvious and it was significantly less attractive. Looks very interesting!

• WorkOS

  workos.com sponsored

  The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  

• tracy

  57 7,814 9.6 C++

  Frame profiler

If you aren't adverse to manual instrumentation there's also Tracy[1].

[1]: https://github.com/wolfpld/tracy

• linux

  980 170,074 10.0 C

  Linux kernel source tree

work somewhat for Python in that you'll see the Python interpreter frames (probably uninteresting), but you will see any ffi calls (e.g., numpy) with proper stacks.

[1]: https://github.com/torvalds/linux/blob/master/tools/perf/Doc...

• owee

  1 33 3.4 OCaml

  OCaml library to work with DWARF format

Yes, in fact this is how we've been narrowing down performance problems in it and its dependencies :)

- https://github.com/let-def/owee/issues/23

• InfluxDB

  www.influxdata.com sponsored

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

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