feat: added keep message

[shakcho]

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Project	Deployment	Actions	Updated (UTC)
konsole	Ready	Preview, Comment	Jun 10, 2026 3:36pm

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📊 Benchmark Results

🔴 Significant regression detected — at least one metric exceeds the 15% threshold.
_{🟢 within ±5% of baseline (or improvement) · 🟡 5–15% regression · 🔴 >15% regression · 🆕 no baseline yet}

Throughput (ops/sec — higher is better)

Logger	Current	Baseline	Δ	Status
Konsole (silent+buffer)	2.23M	2.29M	-2.5%	🟢
Konsole (silent, no buffer)	6.25M	8.17M	-23.5%	🔴
Konsole (JSON → /dev/null)	244.4K	244.9K	-0.2%	🟢
Konsole (child+buffer)	2.79M	2.71M	+3.1%	🟢
Konsole (child, no buffer)	79.34M	90.40M	-12.2%	🟡
Pino (disabled)	8.98M	9.26M	-3.0%	🟢
Pino (JSON → /dev/null)	285.2K	288.4K	-1.1%	🟢
Pino (child, disabled)	78.57M	87.33M	-10.0%	🟡
Winston (silent)	1.15M	1.18M	-3.0%	🟢
Winston (JSON → /dev/null)	124.0K	140.7K	-11.9%	🟡
Winston (child, silent)	906.1K	938.7K	-3.5%	🟢
Consola (silent)	7.52M	7.64M	-1.6%	🟢
Consola (JSON → /dev/null)	220.8K	218.4K	+1.1%	🟢
Consola (tagged child, silent)	14.92M	14.20M	+5.1%	🟢
Bunyan (JSON → /dev/null)	212.3K	206.8K	+2.7%	🟢
Bunyan (child → /dev/null)	235.7K	230.6K	+2.2%	🟢

Latency p50 (lower is better)

Logger	Current	Baseline	Δ	Status
Konsole (silent+buffer)	331 ns	327 ns	+1.1%	🟢
Konsole (silent, no buffer)	88 ns	88 ns	+0.5%	🟢
Konsole (JSON → /dev/null)	3.77 µs	3.76 µs	+0.4%	🟢
Konsole (child+buffer)	267 ns	263 ns	+1.3%	🟢
Konsole (child, no buffer)	6 ns	6 ns	+0.0%	🟢
Pino (disabled)	98 ns	96 ns	+2.5%	🟢
Pino (JSON → /dev/null)	3.06 µs	3.00 µs	+2.1%	🟢
Pino (child, disabled)	6 ns	6 ns	+2.5%	🟢
Winston (silent)	463 ns	457 ns	+1.5%	🟢
Winston (JSON → /dev/null)	4.24 µs	4.14 µs	+2.4%	🟢
Winston (child, silent)	866 ns	852 ns	+1.7%	🟢
Consola (silent)	96 ns	102 ns	-5.5%	🟢
Consola (JSON → /dev/null)	4.39 µs	4.42 µs	-0.6%	🟢
Consola (tagged child, silent)	16 ns	26 ns	-40.2%	🟢
Bunyan (JSON → /dev/null)	4.54 µs	4.62 µs	-1.7%	🟢
Bunyan (child → /dev/null)	4.12 µs	4.19 µs	-1.5%	🟢

Latency p95 (lower is better)

Logger	Current	Baseline	Δ	Status
Konsole (silent+buffer)	748 ns	749 ns	-0.1%	🟢
Konsole (silent, no buffer)	94 ns	92 ns	+1.7%	🟢
Konsole (JSON → /dev/null)	5.20 µs	5.11 µs	+1.7%	🟢
Konsole (child+buffer)	296 ns	277 ns	+6.8%	🟡
Konsole (child, no buffer)	6 ns	6 ns	+0.0%	🟢
Pino (disabled)	107 ns	100 ns	+6.6%	🟡
Pino (JSON → /dev/null)	4.21 µs	4.03 µs	+4.5%	🟢
Pino (child, disabled)	6 ns	6 ns	+0.0%	🟢
Winston (silent)	1.44 µs	1.46 µs	-0.8%	🟢
Winston (JSON → /dev/null)	8.67 µs	8.91 µs	-2.7%	🟢
Winston (child, silent)	2.54 µs	2.27 µs	+11.5%	🟡
Consola (silent)	107 ns	107 ns	-0.4%	🟢
Consola (JSON → /dev/null)	4.66 µs	4.71 µs	-1.1%	🟢
Consola (tagged child, silent)	21 ns	30 ns	-28.2%	🟢
Bunyan (JSON → /dev/null)	4.80 µs	4.94 µs	-2.7%	🟢
Bunyan (child → /dev/null)	4.39 µs	4.44 µs	-1.1%	🟢

Latency p99 (lower is better)

Logger	Current	Baseline	Δ	Status
Konsole (silent+buffer)	1.40 µs	1.25 µs	+12.1%	🟡
Konsole (silent, no buffer)	400 ns	375 ns	+6.9%	🟡
Konsole (JSON → /dev/null)	5.74 µs	5.60 µs	+2.6%	🟢
Konsole (child+buffer)	1.18 µs	1.19 µs	-0.6%	🟢
Konsole (child, no buffer)	6 ns	6 ns	+2.6%	🟢
Pino (disabled)	289 ns	257 ns	+12.6%	🟡
Pino (JSON → /dev/null)	10.92 µs	9.26 µs	+18.0%	🔴
Pino (child, disabled)	6 ns	6 ns	+0.0%	🟢
Winston (silent)	1.76 µs	1.74 µs	+1.5%	🟢
Winston (JSON → /dev/null)	182.66 µs	124.74 µs	+46.4%	🔴
Winston (child, silent)	3.73 µs	3.30 µs	+12.8%	🟡
Consola (silent)	118 ns	119 ns	-0.3%	🟢
Consola (JSON → /dev/null)	5.55 µs	5.79 µs	-4.1%	🟢
Consola (tagged child, silent)	28 ns	35 ns	-21.4%	🟢
Bunyan (JSON → /dev/null)	6.00 µs	8.11 µs	-26.1%	🟢
Bunyan (child → /dev/null)	5.35 µs	5.40 µs	-0.9%	🟢

Bundle Size (lower is better)

Asset	Current	Baseline	Δ	Status
ESM raw	58.63 KB	58.28 KB	+0.6%	🟢
ESM gzip	16.91 KB	16.80 KB	+0.6%	🟢
UMD raw	36.56 KB	36.33 KB	+0.6%	🟢
UMD gzip	11.37 KB	11.31 KB	+0.6%	🟢
TYPES raw	44.66 KB	43.82 KB	+1.9%	🟢
TYPES gzip	13.30 KB	13.03 KB	+2.1%	🟢

Memory (lower is better)

Metric	Current	Baseline	Δ	Status
Δ RSS (100K entries)	256.00 KB	0 B	no baseline	🆕
Per-entry	3 B	0 B	no baseline	🆕
Δ RSS (capped buffer, 100K)	0 B	0 B	no baseline	🆕

_{Runner: linux/x64 · Node v22.22.3 · AMD EPYC 7763 64-Core Processor · baseline from 2026-06-10T15:14:35.078Z}

Full benchmark output

┌─────────────────────────────────────────────────────┐
│  Konsole Performance Benchmark                      │
│  Throughput & Latency vs. Popular Loggers           │
└─────────────────────────────────────────────────────┘

  Platform:    linux x64
  Node.js:     v22.22.3
  CPU:         AMD EPYC 7763 64-Core Processor
  Iterations:  100,000


─── Throughput & Latency (strict: serialize + sync write per line) ─

┌─────────┬──────────────────────────────────┬──────────────────┬───────────┬───────────┬─────────────┬──────────┐
│ (index) │ Logger                           │ ops/sec          │ p50       │ p95       │ p99         │ Total    │
├─────────┼──────────────────────────────────┼──────────────────┼───────────┼───────────┼─────────────┼──────────┤
│ 0       │ 'Konsole (silent+buffer)'        │ '2.23M ops/sec'  │ '331 ns'  │ '748 ns'  │ '1.40 µs'   │ '45 ms'  │
│ 1       │ 'Konsole (silent, no buffer)'    │ '6.25M ops/sec'  │ '88 ns'   │ '94 ns'   │ '400 ns'    │ '16 ms'  │
│ 2       │ 'Konsole (JSON → /dev/null)'     │ '244.4K ops/sec' │ '3.77 µs' │ '5.20 µs' │ '5.74 µs'   │ '409 ms' │
│ 3       │ 'Konsole (child+buffer)'         │ '2.79M ops/sec'  │ '267 ns'  │ '296 ns'  │ '1.18 µs'   │ '36 ms'  │
│ 4       │ 'Konsole (child, no buffer)'     │ '79.34M ops/sec' │ '6 ns'    │ '6 ns'    │ '6 ns'      │ '1 ms'   │
│ 5       │ 'Pino (disabled)'                │ '8.98M ops/sec'  │ '98 ns'   │ '107 ns'  │ '289 ns'    │ '11 ms'  │
│ 6       │ 'Pino (JSON → /dev/null)'        │ '285.2K ops/sec' │ '3.06 µs' │ '4.21 µs' │ '10.92 µs'  │ '351 ms' │
│ 7       │ 'Pino (child, disabled)'         │ '78.57M ops/sec' │ '6 ns'    │ '6 ns'    │ '6 ns'      │ '1 ms'   │
│ 8       │ 'Winston (silent)'               │ '1.15M ops/sec'  │ '463 ns'  │ '1.44 µs' │ '1.76 µs'   │ '87 ms'  │
│ 9       │ 'Winston (JSON → /dev/null)'     │ '124.0K ops/sec' │ '4.24 µs' │ '8.67 µs' │ '182.66 µs' │ '807 ms' │
│ 10      │ 'Winston (child, silent)'        │ '906.1K ops/sec' │ '866 ns'  │ '2.54 µs' │ '3.73 µs'   │ '110 ms' │
│ 11      │ 'Consola (silent)'               │ '7.52M ops/sec'  │ '96 ns'   │ '107 ns'  │ '118 ns'    │ '13 ms'  │
│ 12      │ 'Consola (JSON → /dev/null)'     │ '220.8K ops/sec' │ '4.39 µs' │ '4.66 µs' │ '5.55 µs'   │ '453 ms' │
│ 13      │ 'Consola (tagged child, silent)' │ '14.92M ops/sec' │ '16 ns'   │ '21 ns'   │ '28 ns'     │ '7 ms'   │
│ 14      │ 'Bunyan (JSON → /dev/null)'      │ '212.3K ops/sec' │ '4.54 µs' │ '4.80 µs' │ '6.00 µs'   │ '471 ms' │
│ 15      │ 'Bunyan (child → /dev/null)'     │ '235.7K ops/sec' │ '4.12 µs' │ '4.39 µs' │ '5.35 µs'   │ '424 ms' │
└─────────┴──────────────────────────────────┴──────────────────┴───────────┴───────────┴─────────────┴──────────┘

─── Realistic production: async / buffered JSON throughput ────────

┌─────────┬──────────────────────────────────┬──────────────────┬──────────────────────┐
│ (index) │ Logger                           │ ops/sec          │ Total (emit + flush) │
├─────────┼──────────────────────────────────┼──────────────────┼──────────────────────┤
│ 0       │ 'Konsole (JSON, async/buffered)' │ '311.5K ops/sec' │ '321 ms'             │
│ 1       │ 'Pino (JSON, async/buffered)'    │ '257.8K ops/sec' │ '388 ms'             │
│ 2       │ 'Winston (JSON, async/buffered)' │ '195.7K ops/sec' │ '511 ms'             │
│ 3       │ 'Bunyan (JSON, async/buffered)'  │ '250.5K ops/sec' │ '399 ms'             │
│ 4       │ 'Consola (JSON, async/buffered)' │ '267.0K ops/sec' │ '374 ms'             │
└─────────┴──────────────────────────────────┴──────────────────┴──────────────────────┘

─── Bundle / Install Size ───────────────────────────────────────

┌─────────┬───────────────┬─────────────┬──────────┬──────────────┬──────────────────────────────────────────┐
│ (index) │ Logger        │ ESM (min)   │ Gzip     │ Dependencies │ Note                                     │
├─────────┼───────────────┼─────────────┼──────────┼──────────────┼──────────────────────────────────────────┤
│ 0       │ 'Konsole'     │ '34 KB'     │ '~10 KB' │ '0'          │ 'Zero-dep, ESM+UMD'                      │
│ 1       │ 'Pino'        │ 'N/A (CJS)' │ '~32 KB' │ '5+'         │ 'sonic-boom, fast-redact, etc.'          │
│ 2       │ 'Winston'     │ 'N/A (CJS)' │ '~70 KB' │ '10+'        │ 'logform, triple-beam, etc.'             │
│ 3       │ 'Bunyan'      │ 'N/A (CJS)' │ '~45 KB' │ '3+'         │ 'dtrace-provider optional'               │
│ 4       │ 'Consola'     │ 'ESM'       │ '~12 KB' │ '7+'         │ 'UnJS family, browser+Node'              │
│ 5       │ 'console.log' │ '0 KB'      │ '0 KB'   │ '0'          │ 'No structure, no levels, no transports' │
└─────────┴───────────────┴─────────────┴──────────┴──────────────┴──────────────────────────────────────────┘

─── Memory Usage (100K entries) ─────────────────────────────────

  RSS before:  427.9 MB
  RSS after:   428.1 MB
  Delta:       0.3 MB for 100K entries
  Per entry:   ~3 bytes

  With maxLogs=10K (100K writes, 10K retained):
  Delta:       0.0 MB

  → JSON results written to /home/runner/work/console-logger/console-logger/benchmark-throughput.json

Done.

┌─────────────────────────────────────────────────────┐
│  Konsole Bundle Size Analysis                       │
└─────────────────────────────────────────────────────┘

─── Konsole Output Files ─────────────────────────────

  ESM   (dist/konsole.js):       58.63 KB  →  16.91 KB gzip
  UMD   (dist/konsole.umd.cjs):  36.56 KB  →  11.37 KB gzip
  Types (dist/index.d.ts):        44.66 KB  →  13.30 KB gzip
  Dependencies:                  0 (zero-dependency)

─── Install Size Comparison ──────────────────────────
  (install sizes from node_modules — install competitors with:
   npm install --no-save pino winston bunyan consola)

┌─────────┬──────────────────┬─────────────┬──────────────┐
│ (index) │ Package          │ Direct deps │ Install size │
├─────────┼──────────────────┼─────────────┼──────────────┤
│ 0       │ 'konsole-logger' │ 0           │ '139.85 KB'  │
│ 1       │ 'pino'           │ 11          │ '1.25 MB'    │
│ 2       │ 'winston'        │ 11          │ '396.00 KB'  │
│ 3       │ 'bunyan'         │ 0           │ '224.00 KB'  │
│ 4       │ 'consola'        │ 0           │ '440.00 KB'  │
└─────────┴──────────────────┴─────────────┴──────────────┘

─── Source File Sizes ────────────────────────────────

  src/Konsole.ts                             40.76 KB
  src/formatter.ts                           13.36 KB
  src/types.ts                               12.29 KB
  src/CircularBuffer.ts                      2.22 KB
  src/levels.ts                              541 B
  src/env.ts                                 1.56 KB
  src/transports/HttpTransport.ts            5.50 KB
  src/transports/ConsoleTransport.ts         1.60 KB
  src/transports/StreamTransport.ts          8.73 KB
  src/transports/FileTransport.ts            12.27 KB
  src/transports/base.ts                     2.35 KB
  ────────────────────────────────────────── ─────────
  Total source                               101.15 KB

  → JSON results written to /home/runner/work/console-logger/console-logger/benchmark-size.json

_{This check is informational only — it never blocks merging. Tune thresholds via `KONSOLE_THRESHOLD_YELLOW` / `KONSOLE_THRESHOLD_RED`.}