Show HN: Open-source project – HTTP cache and reverse proxy

1 month ago 2

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High‑performance in‑memory HTTP cache & reverse proxy for latency‑sensitive workloads.
Built in Go with sharded storage, TinyLFU admission, background refresh, upstream controls, and observability.

About Me

I’m Borislav Glazunov, 29 y.o., senior/lead developer (Golang, Rust, PHP).
Open to visa sponsorship in New Zealand, Australia, Canada, EU, and Cyprus.

About the Project

advCache — open‑source (Apache‑2.0) in‑memory HTTP cache & reverse proxy.

Throughput

160–170k RPS locally; ~250k RPS on 24‑core bare‑metal (50GB cache).

Memory

1.5–3GB overhead at 50GB (no traces); ~7GB at 100% OTEL sampling.

Hot Path

Zero allocations, sharded counters, per‑shard LRU, TinyLFU admission.

Control Plane

Runtime toggles: admission, eviction, refresh, compression, observability.

Observability

Prometheus/VictoriaMetrics + OpenTelemetry tracing.

Kubernetes

Health probes, ConfigMap config, Docker image.

Quickstart (Starter Config)

cache: api: port: '8020' # <-- CHANGEME upstream: backend: addr: http://127.0.0.1:8081 # <-- CHANGEME origin compression: enabled: true observability: enabled: true endpoint: 127.0.0.1:4318 # <-- CHANGEME OTEL Collector admission: enabled: true

See the full configuration in the repo README.

Runtime Endpoints

Main: GET /{any:*}
Health: GET /k8s/probe
Metrics: GET /metrics
Bypass: /cache/bypass, /on, /off
Compression: /cache/http/compression, /on, /off
Config: /cache/config
Entry: /cache/entry?key=<uint64>
Clear: /cache/clear → ?token=
Invalidate: /cache/invalidate
Upstream: /cache/upstream/policy, /await, /deny
Evictor: /cache/eviction, /on, /off, /scale
Lifetime: /cache/lifetime-manager, /on, /off
GC: /cache/force-gc, /on, /off, /call
Admission: /cache/admission, /on, /off
Tracing: /cache/observability, /on, /off

Open Source & Modular

Apache‑2.0 license. Contributions welcome.

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