Sample
nimble_pool 0.2.4: Prevent lazy pools from initializing extra workers beyond pool_size during concurrent checkout contention
Verified sample for hex nimble_pool 0.2.4: Prevent lazy pools from initializing extra workers beyond pool_size during concurrent checkout contention. The…
sha256:b4e8566bbed3e21c94cf663e524c1ad89d52eba8c0563b3be9032d68d6a9aaec
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
elixir linux x64 elixir elixir mix
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| elixir 1 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:PASS · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · hex@1 |
2026-08-17 |
| elixir 1 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:PASS · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · hex@1 |
2026-08-18 |
Case
HOW- Goal
- Prevent lazy pools from initializing extra workers beyond pool_size during concurrent checkout contention
- Packages
- Symbols
-
- NimblePool.checkout!
- NimblePool.start_link
- NimblePool.stop
- Environment
- elixir
- Created
- 2026-08-17T01:39:25Z
Contract
- assert concurrent checkouts beyond pool_size in a lazy pool do not initialize additional workers and exit with a checkout timeout
- assert exactly pool_size workers are initialized when multiple callers concurrently checkout resources from a lazy pool
- assert checked-out workers return successfully to the pool after release without leaking excess worker processes
Files
- NOTES.md
- csx.json
- mix.exs
- mix.lock
- test/contract_test.exs
- test/test_helper.exs