Node 24: +10% throughput, concurrency caveat
Benchmarks show Node 24 delivers roughly +10% throughput versus prior releases but can still degrade similarly under high concurrency, and the project announced an evolved release schedule and backported security/optimizations from 22→24 dschewchenko. The data frames Node 24 as a steady perf step rather than a cure‑all for concurrency bottlenecks dschewchenko.
Independent benchmarks noted a roughly 10% median throughput uplift across core-module tests when comparing v22 to v24, with each configuration run 30 times for statistical [confidence blog.rafaelgss.dev]. That uplift is workload‑dependent: community SQLite tests reported severe regressions in some configurations (as much as −57% throughput versus earlier lines) highlighting that disk‑bound or locking-heavy paths in v24 can perform worse under certain [conditions deepwiki.com]. Microbenchmarks of request‑context primitives show differences too: the Platformatic AsyncLocalStorage workload and related Fastify/OpenTelemetry runs documented measurable overheads and variability across Node versions, underscoring why concurrency stress tests still expose bottlenecks in [v24 github.com]. The project coordinated security releases on January 13, 2026 that patched 3 high, 4 medium and 1 low severity issues across 20.x, 22.x, 24.x and 25.x, and those fixes were shipped to active release lines to limit [fragmentation nodejs.org]. Node.js maintainers have been actively backporting fixes into the 24.x line (and taking backport requests for 22.x), with specific backport issues and pull requests visible in the nodejs/node repo — for example, partial backports around the SEA feature landed in v24.14.0 while other backport requests remain [open github.com]. The project also announced a planned release cadence change — moving to one major release per year starting with Node 27 and making each major version an LTS line — a shift the Release WG framed as reducing releaser burden and aligning version numbers with calendar [years nodejs.org].
