eBPF: Correlating rustls Plaintext to TCP Connections Without a File Descriptor
Follow an eBPF debugging trail through rustls, Tokio inlining, and an empty map to learn how TLS plaintext gets matched to the right TCP connection.
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Latest insights on Agentic AI workflows, cloud native architectures, and performance optimization best practices from the Speedscale team.
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Five Ways to Use OpenTelemetry Beyond Observability
Teams run inventory, security logs, request routing and billing through OpenTelemetry. Five non-observability uses, and the failure mode of each.
From Handwritten Mocks to proxymock: The Complete Loop
Part 10 of Getting Started with Mocks: use proxymock to record real API traffic, inject failures, verify side effects, and expose contract drift.
Did It Actually Send?
Part 4 of Getting Started with Mocks: the notifier stops returning a message and starts sending one, so the test needs a spy instead of a return value.
Make Failure Boring with Mocks
Part 3 of Getting Started with Mocks: the same seam, now returning refusals, timeouts and nonsense, so the failure paths finally get tested.
Mock the Wire
Part 7 of Getting Started with Mocks: a fake HTTP server finally runs the real client, so paths, headers, and parsing get tested. Java, Node, Go, Python.
Test Behavior, Not Choreography
Part 5 of Getting Started with Mocks: a test that pinned the retry schedule broke on a change no customer could notice. Here is how to rewrite it.
They Aren't All Mocks
Part 6 of Getting Started with Mocks: stub, spy, fake, mock, and dummy, sorted by what each one does. Java, Node, Go, Python.
What Mocks Are Actually For
Part 1 of Getting Started with Mocks: the one job a mock does, the five situations where you need one, and what a green mocked test does not prove.
When Handwritten Mocks Stop Scaling
Part 9 of Getting Started with Mocks: a decision framework for stubs, fakes, fake servers, mock servers, record-and-replay, and real dependencies.