github.com/minio/minio@v0.0.0-20240328213742-3f72439b8a27/internal/ioutil/discard.go (about) 1 // Copyright (c) 2015-2023 MinIO, Inc. 2 // 3 // This file is part of MinIO Object Storage stack 4 // 5 // This program is free software: you can redistribute it and/or modify 6 // it under the terms of the GNU Affero General Public License as published by 7 // the Free Software Foundation, either version 3 of the License, or 8 // (at your option) any later version. 9 // 10 // This program is distributed in the hope that it will be useful 11 // but WITHOUT ANY WARRANTY; without even the implied warranty of 12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 // GNU Affero General Public License for more details. 14 // 15 // You should have received a copy of the GNU Affero General Public License 16 // along with this program. If not, see <http://www.gnu.org/licenses/>. 17 18 package ioutil 19 20 import ( 21 "io" 22 ) 23 24 // Discard is just like io.Discard without the io.ReaderFrom compatible 25 // implementation which is buggy on NUMA systems, we have to use a simpler 26 // io.Writer implementation alone avoids also unnecessary buffer copies, 27 // and as such incurred latencies. 28 var Discard io.Writer = discard{} 29 30 // discard is /dev/null for Golang. 31 type discard struct{} 32 33 func (discard) Write(p []byte) (int, error) { 34 return len(p), nil 35 } 36 37 // DiscardReader discarded reader 38 func DiscardReader(r io.Reader) { 39 Copy(Discard, r) 40 }