blog (for more details) - https://null-exception1.github.io/blog/posts/roommatefinder

Stack

NextJS + Go + PostGresDB

Benchmark results from different versions

Environment

• OS: Linux
• Arch: amd64
• CPU: Intel(R) Core(TM) i7-9750H @ 2.60GHz
• Go pkg: golang/benchmarks/simplefetch

---

NOTE: older benchmarks were removed for being a little flaky

Worker Pool Benchmark Results

NumWorkers	Requests/sec	ns/op	B/op	Allocs/op
1	2,705	369,634	13,353	124
50	25,360	39,433	10,325	85
100	13,000	~77,000	(varies)	(varies)

notes

• throughput scales up dramatically from 1 → 50 workers (almost 10×).
• diminishing returns kick in after ~50 workers — at 100, throughput drops due to DB pool saturation, goroutine scheduling overhead, and contention.
• sweet spot depends on CPU cores and DB connection pool size. On this machine (Intel i7‑9750H, 12 threads), ~50 workers gave peak throughput.

Final production results of BlocksHandler

No caching

Running tool: /usr/local/go/bin/go test -test.fullpath=true -benchmem -run=^$ -bench ^BenchmarkBlocksHandler$ golang/benchmarks/simplefetch

goos: linux
goarch: amd64
pkg: golang/benchmarks/simplefetch
cpu: Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
=== RUN   BenchmarkBlocksHandler
BenchmarkBlocksHandler
CACHING:  false
CACHE HITS:  0
CACHE MISSES:  0
BenchmarkBlocksHandler-4             157           7382362 ns/op          293677 B/op       2777 allocs/op
PASS
ok      golang/benchmarks/simplefetch   1.166s

With Caching

Running tool: /usr/local/go/bin/go test -test.fullpath=true -benchmem -run=^$ -bench ^BenchmarkBlocksHandler$ golang/benchmarks/simplefetch

goos: linux
goarch: amd64
pkg: golang/benchmarks/simplefetch
cpu: Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
=== RUN   BenchmarkBlocksHandler
BenchmarkBlocksHandler
CACHING:  true
CACHE HITS:  87716
CACHE MISSES:  1
BenchmarkBlocksHandler-4            4177            286186 ns/op          197142 B/op       1681 allocs/op
PASS
ok      golang/benchmarks/simplefetch   1.204s

Final production results of RoomsBlocksHandler

No caching

Running tool: /usr/local/go/bin/go test -test.fullpath=true -benchmem -run=^$ -bench ^BenchmarkRoomsBlocksHandler$ golang/benchmarks/simplefetch

goos: linux
goarch: amd64
pkg: golang/benchmarks/simplefetch
cpu: Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
=== RUN   BenchmarkRoomsBlocksHandler
BenchmarkRoomsBlocksHandler
BenchmarkRoomsBlocksHandler-4              10000            108929 ns/op              9180 req/s           14851 B/op             143 allocs/op
PASS
ok      golang/benchmarks/simplefetch   1.431s

With caching

Running tool: /usr/local/go/bin/go test -test.fullpath=true -benchmem -run=^$ -bench ^BenchmarkRoomsBlocksHandler$ golang/benchmarks/simplefetch

goos: linux
goarch: amd64
pkg: golang/benchmarks/simplefetch
cpu: Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
=== RUN   BenchmarkRoomsBlocksHandler
BenchmarkRoomsBlocksHandler
BenchmarkRoomsBlocksHandler-4              18542             87024 ns/op             11491 req/s           11587 B/op             101 allocs/op
PASS
ok      golang/benchmarks/simplefetch   2.968s