feat!: add AsyncPipe abstraction, significantly improve throughput of Transform streams

test/Test/Pipes.Node.Stream.js

@@ -1,4 +1,16 @@
 import Stream from 'stream'
+import * as CBOR from "cbor-x";
+import * as CSVDecode from "csv-parse";
+import * as CSVEncode from "csv-stringify";
+
+export const cborDecode = () => new CBOR.DecoderStream({useRecords: false, allowHalfOpen: true});
+export const cborEncode = () => new CBOR.EncoderStream({useRecords: false, allowHalfOpen: true});
+
+export const cborDecodeSync = a => () => CBOR.decodeMultiple(a);
+export const cborEncodeSync = a => () => CBOR.encode(a, {useRecords: false});
+
+export const csvDecode = () => CSVDecode.parse({columns: true, allowHalfOpen: true})
+export const csvEncode = () => CSVEncode.stringify({header: true, allowHalfOpen: true})
 
 export const discardTransform = () => new Stream.Transform({
   transform: function(_ck, _enc, cb) {
@@ -7,6 +19,16 @@ export const discardTransform = () => new Stream.Transform({
   objectMode: true
 })
 
+export const slowTransform = () => {
+  return new Stream.Transform({
+  transform: function(ck, _enc, cb) {
+    this.push(ck)
+    setTimeout(() => cb(), 4)
+  },
+  objectMode: true
+})
+}
+
 export const charsTransform = () => new Stream.Transform({
   transform: function(ck, _enc, cb) {
     ck.split('').filter(s => !!s).forEach(s => this.push(s))