{ "schema_version": 1, "benchmark_id": "amber-v2-site-websocket-2026-08-11", "measured_at": "2026-08-11", "status": "historical_release_candidate_evidence", "subject": { "application": "Amber Framework website release candidate", "source_base_commit": "2bcae249e912f84ecab1d849393c48fed6b729ef", "working_tree_patch_sha256": "89b970a09f028f990c2d585d4835917b9a6e7748f9b4cdf47a790610f92017de", "deployed_binary_sha256": "984b11cbfc178d166fca428c0cb5ac56036f84e9ab675f774cb30592a61050ff", "amber_version": "2.0.0-beta.2", "crystal_version": "1.21.0", "llvm_version": "22.1.8", "build_target": "linux x86_64-v2", "server_port": 41019 }, "infrastructure": { "provider": "DigitalOcean", "region": "nyc1", "network": "private VPC", "target": { "size_slug": "s-1vcpu-512mb-10gb", "shared_vcpus": 1, "memory_mebibytes_advertised": 512, "memory_kibibytes_visible": 469236, "monthly_price_usd_at_measurement": 4, "architecture": "x86_64" }, "load_generator": { "size_slug": "c-4", "dedicated_vcpus": 4, "memory_mebibytes_advertised": 8192, "tool": "wrk 4.1.0", "architecture": "x86_64" } }, "http_method": { "threads": 4, "connections": 16, "warmup_seconds": 5, "baseline_trial_seconds": 15, "baseline_repetitions": 5, "concurrent_trial_seconds": 10, "concurrent_repetitions": 3, "protocol": "HTTP/1.1 keep-alive", "tls": false }, "http_baseline": { "full_homepage": { "path": "/", "response_bytes": 26271, "requests_per_second_trials": [4932.80, 5225.17, 6113.54, 6285.26, 5906.72], "median_requests_per_second": 5906.72, "median_trial_p50_latency_ms": 2.67, "median_trial_p99_latency_ms": 7.07, "successful_responses": 427162, "socket_errors": 0, "non_2xx_responses": 0 }, "rendered_json": { "path": "/index.json", "response_bytes": 881, "requests_per_second_trials": [10369.35, 8364.73, 9042.33, 9354.58, 9513.99], "median_requests_per_second": 9354.58, "median_trial_p50_latency_ms": 1.66, "median_trial_p99_latency_ms": 5.84, "successful_responses": 701730, "socket_errors": 0, "non_2xx_responses": 0 }, "static_agent_index": { "path": "/llms.txt", "response_bytes": 1410, "requests_per_second_trials": [13535.67, 14084.87, 12824.61, 14409.34, 15038.49], "median_requests_per_second": 14084.87, "median_trial_p50_latency_ms": 1.08, "median_trial_p99_latency_ms": 3.90, "successful_responses": 1055356, "socket_errors": 0, "non_2xx_responses": 0 } }, "websocket_method": { "endpoint": "/ws", "topic": "site:proof", "transport": "Amber WebSocket channel over private VPC", "client_action": "connect, join topic, hold, close", "http_during_hold": { "path": "/index.json", "threads": 4, "connections": 16 } }, "websocket_stages": [ { "requested_connections": 100, "connected": 100, "connection_errors": 0, "connect_seconds": 0.032, "hold_seconds": 75, "http_requests_per_second_trials": [9517.62, 11159.13, 11127.73], "http_median_requests_per_second": 11127.73, "http_median_trial_p50_latency_ms": 1.39, "http_median_trial_p99_latency_ms": 5.47, "http_successful_responses": 321213, "target_process_rss_kibibytes": 38032, "target_process_open_file_descriptors": 125, "target_established_connections_during_http_capture": 116 }, { "requested_connections": 500, "connected": 500, "connection_errors": 0, "connect_seconds": 2.397, "hold_seconds": 80, "http_requests_per_second_trials": [6181.86, 6540.69, 6393.69], "http_median_requests_per_second": 6393.69, "http_median_trial_p50_latency_ms": 2.16, "http_median_trial_p99_latency_ms": 17.71, "http_successful_responses": 191290, "target_process_rss_kibibytes": 88604, "target_process_open_file_descriptors": 525, "target_established_connections_during_http_capture": 516 }, { "requested_connections": 1000, "connected": 1000, "connection_errors": 0, "connect_seconds": 11.738, "hold_seconds": 85, "http_requests_per_second_trials": [7620.57, 8057.74, 9065.16], "http_median_requests_per_second": 8057.74, "http_median_trial_p50_latency_ms": 1.83, "http_median_trial_p99_latency_ms": 26.77, "http_successful_responses": 247536, "target_process_rss_kibibytes": 140360, "target_process_open_file_descriptors": 1025, "target_established_connections_during_http_capture": 1016, "target_host_available_memory_kibibytes": 170000, "target_cgroup_peak_bytes": 182628352 }, { "requested_connections": 1000, "connected": 1000, "connection_errors": 0, "connect_seconds": 10.352, "hold_seconds": 30, "purpose": "second connection cycle after the first 1000 clients closed", "target_process_rss_kibibytes": 175644, "target_process_open_file_descriptors": 1009, "target_established_connections": 1000, "target_cgroup_peak_bytes": 182632448 } ], "resource_snapshots": { "idle_before_websockets": { "target_process_rss_kibibytes": 15992, "target_process_open_file_descriptors": 9 }, "after_first_1000_connection_cycle_closed": { "target_process_rss_kibibytes": 131352, "target_process_open_file_descriptors": 9, "target_established_connections": 0 } }, "totals": { "http_successful_responses": 2944287, "http_socket_errors": 0, "http_non_2xx_responses": 0, "websocket_connection_attempts": 2600, "websocket_successful_connections": 2600, "websocket_connection_errors": 0 }, "interpretation": { "supported_statement": "This Amber website release candidate held 1,000 WebSocket clients with zero connection errors on the smallest DigitalOcean target and concurrently served the rendered JSON path at a median 8,057.74 requests per second in that stage.", "limitations": [ "The 100, 500, and 1,000 connection stages were sequential rather than interleaved.", "The shared-vCPU target produced noisy, non-monotonic throughput; the 500-connection stage was slower than the 1,000-connection stage, so these stages are not a causal scaling curve.", "Connections were idle after joining; this does not measure broadcast fan-out, message throughput, slow consumers, TLS, a reverse proxy, a public network, or multiple Amber processes.", "The second 1,000-connection cycle barely changed the cgroup peak, which is consistent with bounded reuse in this short run but is not a memory-leak certification.", "These are dated results for this release candidate, hardware, compiler, and workload—not a capacity promise for every Amber application." ] } }