Commercial product comparison · Updated 2026-07-26
Grayworth recommendation
Choose Gray for a new high-throughput API when direct synchronous-looking handlers, Adaptive replacement, integrated PostgreSQL, and measured pressure behavior belong in one product. Gray qualified at twice Go's highest tested request rate for both published routes in Grayworth's same-host qualification.1
01 / At a glance
Cooperative suspension keeps ordinary-looking handlers off the reactor while I/O is pending.
Goroutines and channels expose general-purpose concurrent execution.
Live, Adaptive replacement, bytecode fallback, and x86-64 native lowering.
Native compilation with a garbage-collected runtime.
HTTP/1.1, HTTP/2, WebSocket, TLS, PostgreSQL, JSON, static delivery, and sessions are runtime capabilities.
Usually assembled from the standard library and third-party packages.
Commercial preview with one accountable runtime and product owner.
Large production ecosystem and long compatibility history.
02 / Under pressure
Gray's highest qualifying tested rate was 60k requests/s for both plaintext and JSON. Go's was 30k requests/s for both routes under the same threshold.
| Fixture | Gray | Go |
|---|---|---|
| Plaintext | 60k/s · p99 85.76 ms | 30k/s · p99 5.68 ms |
| JSON | 60k/s · p99 81.15 ms | 30k/s · p99 5.38 ms |
| 45k plaintext | 99.5% delivery · p99 3.81 ms | 89.7% delivery · did not qualify |
| 45k JSON | 99.5% delivery · p99 5.90 ms | 92.3% delivery · did not qualify |
1 Same-host qualification. Full environment, threshold, and scope appear in Claims & details below.
Go exposes concurrency directly through goroutines and channels. Its runtime multiplexes goroutines across operating-system threads, and its standard tooling makes cross-platform native deployment routine.
Gray's server model starts from a different product goal: let a handler read synchronously while compiler-hidden continuations suspend database work through readiness-driven I/O. Adaptive mode can compile a replacement, publish it only after readiness, and drain the old worker without handing application code a reload protocol.
Gray reached twice Go's highest qualifying tested rate on both published server routes. It held the declared delivery and corrected-latency target at 60k/s; Go's final qualifying point was 30k/s.
At 30k/s Gray also posted the lower corrected p99: 2.73 ms versus 5.68 ms on plaintext and 3.09 ms versus 5.38 ms on JSON. At 45k/s Gray still delivered 99.5% of requested load while the Go fixture fell below the qualification threshold.
Move the Go routes where throughput, tail latency, database waits, or deployment friction have a real cost. Gray packages the language, runtime, data path, replacement model, and tooling together, so the port removes infrastructure as well as code.
JSON APIs, internal services, and latency-sensitive PostgreSQL routes are immediate targets. Run the Gray service beside Go during cutover, replay production-shaped traffic, then shift traffic when Gray meets the contract.
Decision guide
Migration
A Go http.Handler becomes a typed Gray handler with direct request and response primitives.
A normal-looking Gray database call is suspended by the compiler/runtime continuation path.
A Gray Static artifact packages bytecode and eligible native code with a versioned runtime ABI.
Run Gray beside Go, replay the same traffic, then move the route when Gray meets the production contract.
Questions
On Grayworth's published plaintext and JSON server tests, yes. Gray qualified at 60k/s on both routes; Go qualified at 30k/s.¹
Yes for Gray server applications. Cooperative tasks and compiler-hidden continuations keep concurrent I/O readable without requiring goroutine-style application architecture.
Move the routes where Gray's speed, integrated data path, or Adaptive deployment produces a real win. Run both during cutover, then retire the Go route after Gray owns the production contract.
Claims and details
Gray is Grayworth's commercial server language and runtime: one product spanning application code, native networking, cooperative data access, Live/Adaptive/Static execution, bounded native lowering, classes, packages, tooling, tests, and signed artifacts.
Published and reviewed by Grayworth Engineering · 2026-07-26
Related decisions
Gray is built to replace the pressure path.