Go Application

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Let’s initiate module for our future code:

go mod init infinisoft/dispatcher-go

Now we’ll add main.go file that implements logic of the dispatcher:

package main

import (

	hash "github.com/theTardigrade/golang-hash"

type name struct {
	FirstName string `json:"firstName"`
	LastName  string `json:"lastName"`

var NameStorage = map[uint64]name{}

var mutex = &sync.Mutex{}

func nameToHash(n name) uint64 {
	return hash.Uint64String(n.FirstName) ^ hash.Uint64String(n.LastName)

func postNames(c *gin.Context) {
	var Names []name
	var resp = map[uint64]name{}
	var temp = map[uint64]name{}

	if err := c.BindJSON(&Names); err != nil {

	for _, element := range Names {
		if _, ok := NameStorage[nameToHash(element)]; ok {
			resp[nameToHash(element)] = element
		} else {
			temp[nameToHash(element)] = element

	for index, element := range temp {
		NameStorage[index] = element

	respSlice := make([]name, 0, len(resp))

	for _, value := range resp {
		respSlice = append(respSlice, value)

	c.IndentedJSON(http.StatusOK, respSlice)

func deleteNames(c *gin.Context) {
	var Names []name

	if err := c.BindJSON(&Names); err != nil {

	for _, element := range Names {
		delete(NameStorage, nameToHash(element))

func main() {
	router := gin.Default()
	router.POST("/names", postNames)
	router.DELETE("/names", deleteNames)


Running application as go run . with further tests in Postman confirms that the logic works similar to what we recently implemented in Java, JavaScript and C#. Note that server runs on port 9000:

Repeat request to see exclusion:

And cleanup:

It’s time to dockerize application – add the following Dockerfile:

## Build
FROM golang:1.16-buster AS build


COPY go.mod ./
COPY go.sum ./
RUN go mod download

COPY *.go ./

RUN go build -o /go-docker

## Deploy
FROM gcr.io/distroless/base-debian10


COPY --from=build /go-docker /go-docker


USER nonroot:nonroot

ENTRYPOINT ["/go-docker"]

Build image as:

docker build . -t infinisoft/dispatcher-go

As before, take a note that image size is just 29.8MB – so far the smallest.

Run application in Docker as docker run -p 9000:9000 -d infinisoft/dispatcher-go and note initial memory consumption: 9.262MiB.

Next let’s run updated JMeter scenario (attached) to populate and clean up dispatcher cache. As before, we’ll run 100 threads in 100 cycles with 1 second ramp-up period.

On completion in 8 seconds (AMD FX-8320 with 16GB RAM) the Apache JMeter shows:

During test we’ll notice that application uses only single CPU core, 19.5-18.45MiB of RAM.

Thus solution for Dispatcher application on Go has smallest footprint and in the same time it is fastest among solutions we discussed before:

LanguageCompiled application, MbDocker Image, MbMemory Consumption, MbThroughput, requests/sec

* Folder size with executable application and required assemblies

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