Potential buffering issues aside, as others have pointed out the node.js example is performing asynchronous writes, unlike the other languages' examples (as far

Potential buffering issues aside, as others have pointed out the node.js example is performing asynchronous writes, unlike the other languages' examples (as far as I know). To do a proper synchronous write, you'd do something like: node -e 'const { writeSync } = require("fs"); while (1) writeSync(1, "1");' | pv > /dev/null That gets me ~1.1MB/s with node v18.1.0 and kernel 5.4.0.