fastify-riotjs-and-lowdb/node_modules/sonic-boom

sonic-boom  

Extremely fast utf8-only stream implementation to write to files and file descriptors.

This implementation is partial, but support backpressure and .pipe() in is here. However, it is 2-3x faster than Node Core fs.createWriteStream():

benchSonic*1000: 2215.220ms
benchSonicSync*1000: 8315.173ms
benchSonic4k*1000: 2184.558ms
benchSonicSync4k*1000: 1733.582ms
benchCore*1000: 6513.752ms

Note that sync mode without buffering is slower than a Node Core WritableStream, however this mode matches the expected behavior of console.log().

Note that if this is used to log to a windows terminal (cmd.exe or powershell), it is needed to run chcp 65001 in the terminal to correctly display utf-8 characters, see chcp for more details.

Install

npm i sonic-boom

Example

'use strict'

const SonicBoom = require('sonic-boom')
const sonic = new SonicBoom(process.stdout.fd) // or '/path/to/destination'

for (var i = 0; i < 10; i++) {
  sonic.write('hello sonic\n')
}

API

SonicBoom(String|Number, [minLength], [sync])

Creates a new instance of SonicBoom.

The first argument can be:

1. a string that is a path to a file to be written to (mode 'a')
2. a file descriptor, something that is returned by fs.open or fs.openSync.

The second argument is the minimum length of the internal buffer that is required before flushing.

The third argument is a flag that, when true, causes SonicBoom to perform synchronous writes.

It will emit the 'ready' event when a file descriptor is available.

SonicBoom#write(string)

Writes the string to the file. It will return false to signal the producer to slow down.

SonicBoom#flush()

Writes the current buffer to the file if a write was not in progress. Do nothing if minLength is zero or if it is already writing.

SonicBoom#reopen([file])

Reopen the file in place, useful for log rotation.

Example:

const stream = new SonicBoom('./my.log')
process.on('SIGUSR2', function () {
  stream.reopen()
})

SonicBoom#flushSync()

Flushes the buffered data synchronously. This is a costly operation.

SonicBoom#end()

Closes the stream, the data will be flushed down asynchronously

SonicBook#destroy()

Closes the stream immediately, the data is not flushed.

License

MIT