test: optimize test-http2-large-file

Optimize test-http2-large-file so it only allocates a single buffer. PR-URL: #26737 Reviewed-By: Matteo Collina <[email protected]> Reviewed-By: Yongsheng Zhang <[email protected]> Reviewed-By: Adrian Estrada <[email protected]>

Author: Trott

test/sequential/test-http2-large-file.js

@@ -1,6 +1,6 @@
 'use strict';
 
-// Test to ensure sending a large stream with a large initial window size works
+// Test sending a large stream with a large initial window size.
 // See: https://github.com/nodejs/node/issues/19141
 
 constcommon=require('../common');
@@ -18,14 +18,15 @@ server.on('stream', (stream) =>{
 
 server.listen(0,common.mustCall(()=>{
 letremaining=1e8;
-constchunk=1e6;
+constchunkLength=1e6;
+constchunk=Buffer.alloc(chunkLength,'a');
 constclient=http2.connect(`http://localhost:${server.address().port}`,
 {settings: {initialWindowSize: 6553500}});
 constrequest=client.request({':method': 'POST'});
 functionwriteChunk(){
 if(remaining>0){
-remaining-=chunk;
-request.write(Buffer.alloc(chunk,'a'),writeChunk);
+remaining-=chunkLength;
+request.write(chunk,writeChunk);
 }else{
 request.end();
 }