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import * as T from '@effect/core'; | |
import {pipeEffect} from '@effect/core/io/Effect'; | |
import {millis} from '@tsplus/stdlib/data/Duration'; | |
import fs from 'fs'; | |
import fetch from 'node-fetch'; | |
import os from 'os'; | |
import path from 'path'; | |
import {fileURLToPath} from 'url'; | |
const formatUsage = (n: number): string => `${(n / 2 ** 20).toFixed(2)} MB`; | |
const __dirname = path.dirname(fileURLToPath(import.meta.url)); | |
const LOG_FILE = path.join(__dirname, '../memory-usage.csv'); | |
fs.writeFileSync(LOG_FILE, 'heap usage in mb' + os.EOL); | |
function noop() { | |
return undefined; | |
} | |
export function main() { | |
const i = setInterval( | |
() => | |
fs.appendFile( | |
LOG_FILE, | |
Math.round(process.memoryUsage().heapUsed / 1024 / 1024) + | |
os.EOL, | |
noop, | |
), | |
200, | |
); | |
const delay = T.effect.delay(millis(1000)); | |
function getRandomData() { | |
return fetch('https://baconipsum.com/api/?type=meat-and-filler¶s=1') | |
.then(r => r.json()) | |
.then(a => a[0]); | |
} | |
return pipeEffect( | |
T.stream.repeatEffect(() => T.effect.promise(getRandomData)), | |
T.stream.mapEffect(a => delay(T.effect.succeed(() => a))), | |
T.stream.tap(a => { | |
console.log(a); | |
return T.effect.succeed(() => undefined); | |
}), | |
T.stream.runDrain, | |
T.effect.tap(() => { | |
console.log(formatUsage(process.memoryUsage().heapUsed)); | |
clearInterval(i); | |
return T.effect.succeed(() => undefined); | |
}), | |
T.effect.unsafeRunPromiseExit, | |
); | |
} | |
main(); |
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import * as T from '@effect/core'; | |
import {pipeEffect} from '@effect/core/io/Effect'; | |
import {millis} from '@tsplus/stdlib/data/Duration'; | |
import events from 'events'; | |
import fs from 'fs'; | |
import os from 'os'; | |
import path from 'path'; | |
import readline from 'readline'; | |
import {fileURLToPath} from 'url'; | |
const formatUsage = (n: number): string => `${(n / 2 ** 20).toFixed(2)} MB`; | |
const __dirname = path.dirname(fileURLToPath(import.meta.url)); | |
const LOG_FILE = path.join(__dirname, '../memory-usage.csv'); | |
fs.writeFileSync(LOG_FILE, 'heap usage in mb' + os.EOL); | |
function noop() { | |
return undefined; | |
} | |
const rl = readline.createInterface({ | |
input: fs.createReadStream('file-200MB.txt'), | |
crlfDelay: Infinity, | |
}); | |
const delay = T.effect.delay(millis(10)); | |
export function main() { | |
const i = setInterval( | |
() => | |
fs.appendFile( | |
LOG_FILE, | |
Math.round(process.memoryUsage().heapUsed / 1024 / 1024) + | |
os.EOL, | |
noop, | |
), | |
200, | |
); | |
return pipeEffect( | |
T.stream.async<unknown, never, string>(emit => { | |
console.log('start'); | |
rl.on('line', line => emit(T.effect.succeed(() => line))); | |
events.once(rl, 'close').then(() => { | |
emit.end(); | |
console.log(formatUsage(process.memoryUsage().heapUsed)); | |
clearInterval(i); | |
console.log('end'); | |
}); | |
}), | |
T.stream.mapEffect(a => delay(T.effect.succeed(() => a))), | |
T.stream.runDrain, | |
T.effect.unsafeRunPromiseExit, | |
); | |
} | |
main(); |
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import * as T from '@effect/core'; | |
import {pipeEffect} from '@effect/core/io/Effect'; | |
import events from 'events'; | |
import fs from 'fs'; | |
import os from 'os'; | |
import path from 'path'; | |
import readline from 'readline'; | |
import {fileURLToPath} from 'url'; | |
const formatUsage = (n: number): string => `${(n / 2 ** 20).toFixed(2)} MB`; | |
const __dirname = path.dirname(fileURLToPath(import.meta.url)); | |
const LOG_FILE = path.join(__dirname, '../memory-usage.csv'); | |
fs.writeFileSync(LOG_FILE, 'heap usage in mb' + os.EOL); | |
function noop() { | |
return undefined; | |
} | |
export function main() { | |
const i = setInterval( | |
() => | |
fs.appendFile( | |
LOG_FILE, | |
Math.round(process.memoryUsage().heapUsed / 1024 / 1024) + | |
os.EOL, | |
noop, | |
), | |
10, | |
); | |
return pipeEffect( | |
T.stream.async<unknown, never, string>(emit => { | |
console.log('start'); | |
const rl = readline.createInterface({ | |
input: fs.createReadStream('file-50MB.txt'), | |
crlfDelay: Infinity, | |
}); | |
rl.on('line', line => emit(T.effect.succeed(() => line))); | |
events.once(rl, 'close').then(() => { | |
emit.end(); | |
console.log('end'); | |
}); | |
}), | |
T.stream.runDrain, | |
T.effect.tap(() => { | |
console.log(formatUsage(process.memoryUsage().heapUsed)); | |
clearInterval(i); | |
return T.effect.succeed(() => undefined); | |
}), | |
T.effect.unsafeRunPromiseExit, | |
); | |
} | |
main(); |
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import events from 'events'; | |
import fs from 'fs'; | |
import os from 'os'; | |
import path from 'path'; | |
import readline from 'readline'; | |
import {fileURLToPath} from 'url'; | |
const __dirname = path.dirname(fileURLToPath(import.meta.url)); | |
const LOG_FILE = path.join(__dirname, '../memory-usage.csv'); | |
fs.writeFileSync(LOG_FILE, 'heap usage in mb' + os.EOL); | |
function noop() { | |
return undefined; | |
} | |
export async function main() { | |
const i = setInterval( | |
() => | |
fs.appendFile( | |
LOG_FILE, | |
Math.round(process.memoryUsage().heapUsed / 1024 / 1024) + | |
os.EOL, | |
noop, | |
), | |
1000, | |
); | |
const rl = readline.createInterface({ | |
input: fs.createReadStream('file-50MB.txt'), | |
crlfDelay: Infinity, | |
}); | |
rl.on('line', line => { | |
console.log(line); | |
}); | |
await events.once(rl, 'close'); | |
clearInterval(i); | |
console.log('end'); | |
} | |
main(); |
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import * as C from '@effect-ts/core/Collections/Immutable/Chunk'; | |
import * as N from '@effect-ts/node/Runtime'; | |
import * as S from '@effect-ts/core/Effect/Experimental/Stream'; | |
import * as T from '@effect-ts/core/Effect'; | |
import {pipe} from '@effect-ts/core/Function'; | |
import events from 'events'; | |
import fs from 'fs'; | |
import os from 'os'; | |
import path from 'path'; | |
import readline from 'readline'; | |
import {fileURLToPath} from 'url'; | |
const __dirname = path.dirname(fileURLToPath(import.meta.url)); | |
const LOG_FILE = path.join(__dirname, '../memory-usage.csv'); | |
fs.writeFileSync(LOG_FILE, 'heap usage in mb' + os.EOL); | |
function noop() { | |
return undefined; | |
} | |
export function main() { | |
const i = setInterval( | |
() => | |
fs.appendFile( | |
LOG_FILE, | |
Math.round(process.memoryUsage().heapUsed / 1024 / 1024) + | |
os.EOL, | |
noop, | |
), | |
10, | |
); | |
return pipe( | |
S.async<unknown, never, string>(emit => { | |
console.log('start'); | |
const rl = readline.createInterface({ | |
input: fs.createReadStream('file-50MB.txt'), | |
crlfDelay: Infinity, | |
}); | |
rl.on('line', line => emit(T.succeed(C.from([line])))); | |
events.once(rl, 'close').then(() => { | |
emit.end(); | |
console.log('end'); | |
}); | |
}), | |
S.runDrain, | |
T.tap(() => { | |
clearInterval(i); | |
return T.succeed(undefined); | |
}), | |
N.runMain, | |
); | |
} | |
main(); |
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