| REPOSITORY / STACK | RUNTIME | BASELINE CEILING | TUNED CAPACITY | HEADROOM | GRADE | PRIMARY FAILURE MECHANISM | ACTIONS |
|---|---|---|---|---|---|---|---|
| Go | 2,500 conns | 25,000 conns | +10.0× | A+ | Synchronous socket write loop across peer connections: fleet.Server.handleRegister exhausts epoll buffer (pkg/fleet/server.go:238) | ||
| Rust | 8,500 conns | 85,000 conns | +10.0× | A+ | Os socket file descriptor limit burst: routing.Router.call limits concurrent saturation | ||
| Go | 85 conns | 850 conns | +10.0× | D | Http default transport max idle conns churn: proxy.NewProxy limits concurrent saturation | ||
| TypeScript | 29 conns | 516 conns | +17.8× | B | Unindexed foreign key: model Booking.attendeeId without B-Tree index triggers table scan under PostgreSQL (packages/prisma/schema.prisma:46) | ||
| Python | 1,400 conns | 10,780 conns | +7.7× | A | Capture endpoint synchronous db write: events.batchInsert limits concurrent saturation | ||
| Go | 1,800 conns | 15,300 conns | +8.5× | A | Context allocation outside sync pool: context.Copy limits concurrent saturation | ||
| Go | 140 conns | 1,400 conns | +10.0× | B | Sqlite single writer lock contention: dao.FindRecordsByFilter limits concurrent saturation | ||
| Go | 4,500 conns | 36,000 conns | +8.0× | A | Fasthttp worker pool saturation: app.Listen limits concurrent saturation | ||
| Go | 650 conns | 5,200 conns | +8.0× | A | Erasure chunk disk sync contention: erasureServerPools.PutObject limits concurrent saturation | ||
| Go | 1,200 conns | 12,000 conns | +10.0× | A | Raft proposal channel backpressure: raft.Step limits concurrent saturation | ||
| Go | 3,200 conns | 25,600 conns | +8.0× | A | Upstream dial buffer exhaustion: reverseproxy.ServeHTTP limits concurrent saturation | ||
| Go | 2,100 conns | 16,800 conns | +8.0× | A | Routing table reload mutex contention: roundtripper.RoundTrip limits concurrent saturation | ||
| Go | 180 conns | 1,800 conns | +10.0× | B | Leveldb index batch write lock: model.IndexUpdate limits concurrent saturation | ||
| Go | 420 conns | 4,200 conns | +10.0× | B | Unbuffered websocket channel block: hub.Broadcast limits concurrent saturation | ||
| Go | 850 conns | 8,500 conns | +10.0× | A | Rate limiter global mutex contention: distributor.Push limits concurrent saturation | ||
| Go | 550 conns | 5,500 conns | +10.0× | B | Catalog raft state machine write latency: catalog.Register limits concurrent saturation | ||
| Go | 6,800 conns | 54,400 conns | +8.0× | A+ | Slow consumer write queue saturation: client.processMsg limits concurrent saturation | ||
| Go | 2,200 conns | 17,600 conns | +8.0× | A | Wal appender mutex serialization: head.Append limits concurrent saturation | ||
| Go | 110 conns | 1,320 conns | +12.0× | C | Shared default client hanging goroutines: http.DefaultClient limits concurrent saturation | ||
| Go | 0 conns | — | N/A | REFUSED | Milvus is a distributed vector database engine with gRPC and internal Raft/coordinator models. It does not run user-space HTTP routes or web connection queues simulated by GitStress. | ||
| Go | 480 conns | 4,800 conns | +10.0× | B | Workflow execution optimistic lock collision: history.RecordWorkflowTaskStarted limits concurrent saturation | ||
| Go | 95 conns | 1,140 conns | +12.0× | C | Unindexed workspace build status query: workspace.UpdateBuildStatus limits concurrent saturation | ||
| Rust | 8,500 conns | 85,000 conns | +10.0× | A+ | V8 isolate worker thread binding: ext.http.http_serve limits concurrent saturation | ||
| Rust | 5,400 conns | 43,200 conns | +8.0× | A+ | Webview ipc event bridge serialization: ipc.channel.Channel.send limits concurrent saturation | ||
| Rust | 2,800 conns | 22,400 conns | +8.0× | A | Lmdb mmap reader slot exhaustion: index.Index.search limits concurrent saturation | ||
| Rust | 3,400 conns | 27,200 conns | +8.0× | A | Hnsw graph index lock contention: segment.vector_storage.DenseVectorStorage.get_vector limits concurrent saturation | ||
| Rust | 14,000 conns | 140,000 conns | +10.0× | A+ | Scheduler worker queue lock stealing penalty: runtime.scheduler.multi_thread.Worker.run limits concurrent saturation | ||
| Rust | 1,800 conns | 18,000 conns | +10.0× | A | Key value store transaction conflict: kvs.Datastore.execute limits concurrent saturation | ||
| Rust | 9,500 conns | 76,000 conns | +8.0× | A+ | Actor system arbiter thread saturation: server.HttpServer.run limits concurrent saturation | ||
| Rust | 6,200 conns | 49,600 conns | +8.0× | A+ | Sink buffer disk spill backpressure: topology.builder.Topology.build limits concurrent saturation | ||
| Rust | 850 conns | 8,500 conns | +10.0× | A | Async connection pool timeout wait: pool.Pool.acquire limits concurrent saturation | ||
| Rust | 12,000 conns | 120,000 conns | +10.0× | A+ | H1 dispatcher stream poll delay: proto.h1.dispatch.Dispatcher.poll_catch limits concurrent saturation | ||
| Rust | 420 conns | 4,200 conns | +10.0× | B | Synchronous r2d2 pool checkout block: connection.Connection.execute limits concurrent saturation | ||
| Rust | 4,500 conns | 36,000 conns | +8.0× | A | Hyper client pool idle conn exhaust: async_impl.client.Client.execute limits concurrent saturation | ||
| TypeScript | 62 conns | 620 conns | +10.0× | B | Unbounded select seq scan: posts.getPublishedFeed limits concurrent saturation | ||
| TypeScript | 45 conns | 900 conns | +20.0× | F | Synchronous body parser event loop block: bodyParser.json limits concurrent saturation | ||
| TypeScript | 85 conns | 1,020 conns | +12.0× | B | Uncached token lookup pool starvation: sessions.verifySessionToken limits concurrent saturation | ||
| TypeScript | 68 conns | 680 conns | +10.0× | B | Relation join fanout: items.readMany limits concurrent saturation | ||
| TypeScript | 38 conns | 418 conns | +11.0× | C | Content type populate recursion: entity.populateAll limits concurrent saturation | ||
| TypeScript | 72 conns | 720 conns | +10.0× | B | App definition json parse contention: apps.getPublishedApp limits concurrent saturation | ||
| TypeScript | 42 conns | 504 conns | +12.0× | C | Cart pricing computation loop: cart.retrieveCartWithTotals limits concurrent saturation | ||
| TypeScript | 58 conns | 696 conns | +12.0× | B | Metadata workspace schema load: workspace.getWorkspaceMetadata limits concurrent saturation | ||
| TypeScript | 35 conns | 420 conns | +12.0× | C | Document recipient status check: document.getRecipientTimeline limits concurrent saturation | ||
| TypeScript | 82 conns | 984 conns | +12.0× | B | Shared collection cascade fetch: collections.getSharedTree limits concurrent saturation | ||
| TypeScript | 50 conns | 600 conns | +12.0× | B | Scheduled post poll loop: posts.getScheduledQueue limits concurrent saturation | ||
| TypeScript | 60 conns | 720 conns | +12.0× | B | Survey response json ingest: responses.createResponse limits concurrent saturation | ||
| TypeScript | 420 conns | 4,200 conns | +10.0× | A | Mva closed queuing network solver: queuing.solveMVA limits concurrent saturation | ||
| TypeScript | 120 conns | 1,440 conns | +12.0× | B | Module graph traversal event loop lock: moduleGraph.getModuleById limits concurrent saturation | ||
| TypeScript | 240 conns | 2,400 conns | +10.0× | A | Ipc rpc protocol serialization bottleneck: rpcProtocol.sendMessage limits concurrent saturation | ||
| TypeScript | 65 conns | 780 conns | +12.0× | B | Vector tile outbound socket exhaustion: tiles.fetchGeoJsonTile limits concurrent saturation | ||
| TypeScript | 38 conns | 456 conns | +12.0× | C | Sequential scan transaction ledger: transaction.calculateDynamicFee limits concurrent saturation | ||
| TypeScript | 52 conns | 624 conns | +12.0× | C | Synchronous bcrypt hash worker block: token.verifyRefreshToken limits concurrent saturation | ||
| TypeScript | 95 conns | 1,140 conns | +12.0× | B | Synchronous fs append io saturation: interceptor.recordTraffic limits concurrent saturation | ||
| TypeScript | 78 conns | 936 conns | +12.0× | B | In memory ast diff combinatorial explosion: differ.computeSchemaDiff limits concurrent saturation | ||
| TypeScript | 44 conns | 528 conns | +12.0× | C | Unindexed composite deployment lookup: patches.getLatestDeployment limits concurrent saturation | ||
| TypeScript | 55 conns | 660 conns | +12.0× | B | Individual socket broadcast loop bottleneck: broker.broadcastPresence limits concurrent saturation | ||
| TypeScript | 48 conns | 576 conns | +12.0× | C | Ci webhook commit sha scan: builds.getBuildStatus limits concurrent saturation | ||
| TypeScript | 110 conns | 1,320 conns | +12.0× | B | Main thread filter execution jank: directory.filterCompanies limits concurrent saturation | ||
| TypeScript | 32 conns | 384 conns | +12.0× | C | Unbounded promise all socket churn: orchestrator.dispatchTasks limits concurrent saturation | ||
| TypeScript | 52 conns | 624 conns | +12.0× | B | In memory ast tree unbounded recursion: diagram.generateAstTree limits concurrent saturation | ||
| Python | 2,400 conns | 19,200 conns | +8.0× | A | Dependency injection threadpool handoff: routing.APIRoute.get_route_handler limits concurrent saturation | ||
| Python | 85 conns | 1,020 conns | +12.0× | C | Synchronous wsgi worker thread exhaustion: db.models.sql.compiler.execute_sql limits concurrent saturation | ||
| Python | 65 conns | 650 conns | +10.0× | C | Single thread gunicorn sync worker starvation: app.Flask.wsgi_app limits concurrent saturation | ||
| Python | 1,800 conns | 15,300 conns | +8.5× | A | Kafka producer buffer backpressure: eventstream.produce limits concurrent saturation | ||
| Python | 120 conns | 1,200 conns | +10.0× | B | Scheduler metadata db heartbeat contention: jobs.scheduler_job_runner._run_scheduler_loop limits concurrent saturation | ||
| Python | 3,200 conns | 25,600 conns | +8.0× | A | Actor mailbox sequential queue delay: actor.ActorHandle.remote limits concurrent saturation | ||
| Python | 95 conns | 950 conns | +10.0× | C | Mariadb table lock serial invoice submission: document.Document.insert limits concurrent saturation | ||
| Python | 62 conns | 620 conns | +10.0× | B | Unindexed user email lookup pool exhaustion: users.findByEmail limits concurrent saturation | ||
| Python | 450 conns | 4,500 conns | +10.0× | B | Worker prefetch multiplier head of line blocking: worker.strategy.default limits concurrent saturation | ||
| Python | 1,100 conns | 11,000 conns | +10.0× | A | Recursive model validation cpu overhead: main.BaseModel.model_validate limits concurrent saturation | ||
| Python | 62 conns | 620 conns | +10.0× | B | Checkout stock reservation row lock: checkout.completeCheckout limits concurrent saturation | ||
| Python | 2,800 conns | 22,400 conns | +8.0× | A | Ioloop cpu bound callback block: ioloop.IOLoop.start limits concurrent saturation | ||
| Python | 1,600 conns | 16,000 conns | +10.0× | A | Httpcore connection pool saturation: client.AsyncClient.send limits concurrent saturation | ||
| Python | 3,600 conns | 28,800 conns | +8.0× | A | Middleware stack iteration latency: routing.Route.matches limits concurrent saturation | ||
| Python | 180 conns | 1,800 conns | +10.0× | B | Queue pool checkout timeout under burst: pool.QueuePool.connect limits concurrent saturation | ||
| Python | 4,200 conns | 33,600 conns | +8.0× | A | H11 chunked transfer state machine overhead: protocols.http.h11_impl.H11Protocol.data_received limits concurrent saturation | ||
| Python | 210 conns | 2,100 conns | +10.0× | B | Connection pool exhaustion blocking wait: pool.ConnectionPool.getconn limits concurrent saturation | ||
| PHP | 65 conns | 650 conns | +10.0× | C | Php fpm worker process starvation under load: Routing.Pipeline.then limits concurrent saturation | ||
| PHP | 95 conns | 950 conns | +10.0× | B | Event dispatcher synchronous middleware chain: HttpKernel.handle limits concurrent saturation | ||
| PHP | 75 conns | 750 conns | +10.0× | C | Table column n plus one relationship hydration: Tables.Columns.TextColumn.render limits concurrent saturation | ||
| PHP | 140 conns | 1,120 conns | +8.0× | B | Filesystem stat classmap lookup overhead: Autoload.ClassLoader.loadClass limits concurrent saturation | ||
| PHP | 85 conns | 850 conns | +10.0× | C | Filecache table btree lock contention: Files.Storage.Local.writeStream limits concurrent saturation | ||
| PHP | 55 conns | 660 conns | +12.0× | C | Unindexed account id contact filtering: Services.Contact.create limits concurrent saturation | ||
| PHP | 45 conns | 675 conns | +15.0× | D | Wp postmeta meta key unindexed seq scan: wpdb.query limits concurrent saturation | ||
| PHP | 480 conns | 4,800 conns | +10.0× | B | Log visit row lock contention: Tracker.visit limits concurrent saturation | ||
| PHP | 70 conns | 700 conns | +10.0× | C | Entity permission table scan recursion: Entities.Page.render limits concurrent saturation | ||
| PHP | 60 conns | 720 conns | +12.0× | C | Synchronous audio metadata scanning loop: Services.MediaSyncService.sync limits concurrent saturation | ||
| PHP | 80 conns | 800 conns | +10.0× | C | Invoice pdf generation blocking fpm worker: Services.Invoice.create limits concurrent saturation | ||
| PHP | 50 conns | 600 conns | +12.0× | C | Federated inbox delivery socket exhaustion: Http.Controllers.StatusController.create limits concurrent saturation | ||
| C / C++ | 0 conns | — | N/A | REFUSED | Linux is an operating system kernel executing in privileged ring-0 hardware space. GitStress only simulates user-space web/worker runtimes with network and database queues. It cannot simulate HTTP web users against a monolithic kernel. | ||
| C / C++ | 0 conns | — | N/A | REFUSED | Bitcoin Core is a C++ P2P consensus node that processes peer gossip, block validation, and mempool transactions. It does not run an HTTP web service or SQL database. Concurrency is bounded by script validation thread pools and peer socket limits. | ||
| TypeScript | 0 conns | — | N/A | REFUSED | React is a client and isomorphic user interface library, not an application server. It does not run a persistent network daemon or manage connection pools. | ||
| TypeScript | 0 conns | — | N/A | REFUSED | Vue is a client-side reactive user interface framework without a persistent backend network listener, WSGI worker pool, or database connection pool. | ||
| Elixir | 0 conns | — | N/A | SCHEDULED | Realtime is an Elixir/Phoenix WebSocket server that handles Postgres logical replication slots and WAL fan-out. It is an in-scope web workload, but BEAM process mailbox saturation & ETS lock simulation is scheduled for v0.12. | ||
| C / C++ | 0 conns | — | N/A | REFUSED | Redis is an in-memory key-value data store communicating over the custom RESP protocol. It is not an HTTP web application server with relational ORM queries or WSGI workers. | ||
| C / C++ | 0 conns | — | N/A | REFUSED | Git is a local C command-line revision control utility executing transient process invocations. It does not run a persistent network daemon or manage relational database connection pools. | ||
| C / C++ | 0 conns | — | N/A | REFUSED | Electron is a desktop application runtime embedding Chromium and Node.js for client UI rendering. It is not an enterprise backend server handling concurrent network callers. | ||
| HTML | 0 conns | — | N/A | REFUSED | Bootstrap is a static CSS and front-end styling asset package. It contains no runnable server daemon, network listeners, or transactional database operations. | ||
| Python | 0 conns | — | N/A | REFUSED | Click is a Python command line interface parsing library. It executes local terminal commands without ASGI/WSGI network event loops or connection pools. | ||
| Go | 0 conns | — | N/A | REFUSED | Cobra is a Go library for creating powerful modern CLI applications. It does not initialize network listeners or manage backend database connection pools. |