stream: avoid calls to listenerCount

[ronag]

streams/pipe-object-mode.js n=5000000 ** 6.60 % ±4.18% ±5.73% ±7.81% streams/pipe.js n=5000000 * 3.89 % ±3.24% ±4.59% ±6.59% 

[nodejs-github-bot]

Review requested:

• @nodejs/streams

[ronag]

https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1455/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/55173/

[Uzlopak]

LGTM

[H4ad]

Results:

05:10:29 confidence improvement accuracy (*) (**) (***) 05:10:29 streams/creation.js kind='duplex' n=50000000 -0.12 % ±1.06% ±1.42% ±1.86% 05:10:29 streams/creation.js kind='readable' n=50000000 0.44 % ±1.11% ±1.48% ±1.93% 05:10:29 streams/creation.js kind='transform' n=50000000 *** 9.73 % ±3.59% ±4.79% ±6.25% 05:10:29 streams/creation.js kind='writable' n=50000000 0.85 % ±1.32% ±1.75% ±2.28% 05:10:29 streams/destroy.js kind='duplex' n=1000000 * 2.25 % ±2.02% ±2.69% ±3.50% 05:10:29 streams/destroy.js kind='readable' n=1000000 -1.58 % ±2.03% ±2.70% ±3.52% 05:10:29 streams/destroy.js kind='transform' n=1000000 -0.20 % ±1.53% ±2.04% ±2.66% 05:10:29 streams/destroy.js kind='writable' n=1000000 -0.21 % ±1.61% ±2.14% ±2.79% 05:10:29 streams/pipe-object-mode.js n=5000000 -1.85 % ±3.71% ±4.93% ±6.43% 05:10:29 streams/pipe.js n=5000000 -2.06 % ±3.11% ±4.14% ±5.39% 05:10:29 streams/readable-async-iterator.js sync='no' n=100000 -2.98 % ±5.78% ±7.72% ±10.10% 05:10:29 streams/readable-async-iterator.js sync='yes' n=100000 -2.00 % ±3.70% ±4.99% ±6.61% 05:10:29 streams/readable-bigread.js n=1000 0.42 % ±1.88% ±2.50% ±3.26% 05:10:29 streams/readable-bigunevenread.js n=1000 1.00 % ±1.72% ±2.30% ±3.00% 05:10:29 streams/readable-boundaryread.js type='buffer' n=2000 * 0.76 % ±0.75% ±1.00% ±1.31% 05:10:29 streams/readable-boundaryread.js type='string' n=2000 -0.43 % ±0.54% ±0.72% ±0.94% 05:10:29 streams/readable-from.js type='array' n=10000000 -7.15 % ±7.48% ±10.07% ±13.34% 05:10:29 streams/readable-from.js type='async-generator' n=10000000 *** 6.43 % ±1.16% ±1.55% ±2.03% 05:10:29 streams/readable-from.js type='sync-generator-with-async-values' n=10000000 *** 9.24 % ±1.61% ±2.15% ±2.81% 05:10:29 streams/readable-from.js type='sync-generator-with-sync-values' n=10000000 -0.93 % ±1.55% ±2.07% ±2.70% 05:10:29 streams/readable-readall.js n=5000 -1.37 % ±2.93% ±3.90% ±5.08% 05:10:29 streams/readable-unevenread.js n=1000 -0.12 % ±0.41% ±0.54% ±0.71% 05:10:29 streams/writable-manywrites.js len=1024 callback='no' writev='no' sync='no' n=100000 0.11 % ±0.96% ±1.27% ±1.66% 05:10:29 streams/writable-manywrites.js len=1024 callback='no' writev='no' sync='yes' n=100000 0.22 % ±3.12% ±4.15% ±5.41% 05:10:29 streams/writable-manywrites.js len=1024 callback='no' writev='yes' sync='no' n=100000 0.35 % ±2.28% ±3.04% ±3.95% 05:10:29 streams/writable-manywrites.js len=1024 callback='no' writev='yes' sync='yes' n=100000 -1.60 % ±2.48% ±3.30% ±4.30% 05:10:29 streams/writable-manywrites.js len=1024 callback='yes' writev='no' sync='no' n=100000 0.18 % ±1.18% ±1.57% ±2.04% 05:10:29 streams/writable-manywrites.js len=1024 callback='yes' writev='no' sync='yes' n=100000 0.60 % ±2.40% ±3.19% ±4.15% 05:10:29 streams/writable-manywrites.js len=1024 callback='yes' writev='yes' sync='no' n=100000 0.11 % ±1.85% ±2.46% ±3.21% 05:10:29 streams/writable-manywrites.js len=1024 callback='yes' writev='yes' sync='yes' n=100000 -1.29 % ±2.55% ±3.40% ±4.44% 05:10:29 streams/writable-manywrites.js len=32768 callback='no' writev='no' sync='no' n=100000 -0.47 % ±0.94% ±1.25% ±1.63% 05:10:29 streams/writable-manywrites.js len=32768 callback='no' writev='no' sync='yes' n=100000 1.63 % ±2.50% ±3.33% ±4.34% 05:10:29 streams/writable-manywrites.js len=32768 callback='no' writev='yes' sync='no' n=100000 -1.18 % ±2.30% ±3.09% ±4.07% 05:10:29 streams/writable-manywrites.js len=32768 callback='no' writev='yes' sync='yes' n=100000 -0.25 % ±2.47% ±3.29% ±4.28% 05:10:29 streams/writable-manywrites.js len=32768 callback='yes' writev='no' sync='no' n=100000 -0.38 % ±0.97% ±1.29% ±1.68% 05:10:29 streams/writable-manywrites.js len=32768 callback='yes' writev='no' sync='yes' n=100000 0.03 % ±2.58% ±3.44% ±4.48% 05:10:29 streams/writable-manywrites.js len=32768 callback='yes' writev='yes' sync='no' n=100000 0.17 % ±1.26% ±1.68% ±2.18% 05:10:29 streams/writable-manywrites.js len=32768 callback='yes' writev='yes' sync='yes' n=100000 -1.21 % ±2.20% ±2.93% ±3.81% 

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/55190/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/55214/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/55215/

[mcollina]

lgtm

[nodejs-github-bot]

Landed in 79be4ea