Merge pull request #1505 from 0chain/hotfix/wasm-memory

Tune gc and set extra count to 0 for wasm

Author: dabasov

Makefile

@@ -35,7 +35,7 @@ gosdk-build: gomod-download
 	go build -x -v -tags bn256 ./...
 
 wasm-build: getrev
-	CGO_ENABLED=0 GOOS=js GOARCH=wasm go build -buildvcs=false -o ./zcn.wasm  ./wasmsdk
+	CGO_ENABLED=0 GOOS=js GOARCH=wasm go build -ldflags="-s -w" -buildvcs=false -o ./zcn.wasm  ./wasmsdk
 
 wasm-test: wasm-build
 	env -i $(shell go env) PATH="$(shell go env GOROOT)/misc/wasm:$(PATH)" CGO_ENABLED=0 GOOS=js GOARCH=wasm go test -v github.com/0chain/gosdk/wasmsdk/jsbridge/...

wasmsdk/proxy.go

@@ -6,6 +6,7 @@ package main
 import (
 	"errors"
 	"fmt"
+	"runtime/debug"
 	"sync"
 	"time"
 
@@ -271,6 +272,8 @@ func main() {
 	}
 
 	hideLogs()
+	debug.SetGCPercent(40)
+	debug.SetMemoryLimit(2.5 * 1024 * 1024 * 1024) //2.5 GB
 
 	<-make(chan bool)
 

zboxcore/sdk/allocation.go

@@ -253,6 +253,7 @@ func SetMultiOpBatchSize(size int) {
 func SetWasm() {
 	IsWasm = true
 	BatchSize = 5
+	extraCount = 0
 }
 
 func getPriceRange(name string) (PriceRange, error) {

zboxcore/sdk/downloadworker.go

@@ -38,7 +38,10 @@ import (
 const (
 	DOWNLOAD_CONTENT_FULL  = "full"
 	DOWNLOAD_CONTENT_THUMB = "thumbnail"
-	EXTRA_COUNT            = 2
+)
+
+var (
+	extraCount = 2
 )
 
 type DownloadRequestOption func(dr *DownloadRequest)
@@ -531,7 +534,7 @@ func (req *DownloadRequest) processDownload() {
 			}
 			req.bufferMap = nil
 		}()
-		sz := downloadWorkerCount + EXTRA_COUNT
+		sz := downloadWorkerCount + extraCount
 		if sz > n {
 			sz = n
 		}
@@ -684,7 +687,7 @@ func (req *DownloadRequest) processDownload() {
 	firstReqWG := sync.WaitGroup{}
 	firstReqWG.Add(1)
 	eg, egCtx := errgroup.WithContext(ctx)
-	eg.SetLimit(downloadWorkerCount + EXTRA_COUNT)
+	eg.SetLimit(downloadWorkerCount + extraCount)
 	for i := 0; i < n; i++ {
 		j := i
 		if i == 1 {