From 4dd66d50bf910586425d971d0d3899a691708f38 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mat=C4=9Bj=20Pavl=C3=AD=C4=8Dek?= <tikinang@gmail.com>
Date: Thu, 13 Aug 2026 11:15:46 +0200
Subject: [PATCH] godummy: cpu/ram endpoints

---
 godummy/go.mod     |  2 +-
 godummy/main.go    | 44 +++++++++++++++++++++++++++++++++++++++++++-
 godummy/zerops.yml |  6 ++----
 3 files changed, 46 insertions(+), 6 deletions(-)

diff --git a/godummy/go.mod b/godummy/go.mod
index 24e17dc..4e8599c 100644
--- a/godummy/go.mod
+++ b/godummy/go.mod
@@ -1,3 +1,3 @@
 module github.com/tikinang/godummy
 
-go 1.23.1
+go 1.26.5
diff --git a/godummy/main.go b/godummy/main.go
index 09a2ddc..650e466 100644
--- a/godummy/main.go
+++ b/godummy/main.go
@@ -1,14 +1,56 @@
 package main
 
 import (
+	"crypto/sha256"
 	"fmt"
 	"net/http"
+	"strconv"
+	"sync"
+	"time"
+)
+
+var BuildTime string
+
+const ramChunkSize = 100 * 1024 * 1024 // 0.1 GiB
+
+var (
+	ramMu     sync.Mutex
+	ramChunks [][]byte
 )
 
 func main() {
 	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusOK)
-		_, _ = fmt.Fprintln(w, "OK")
+		_, _ = fmt.Fprintln(w, BuildTime)
+	})
+	http.HandleFunc("/ram", func(w http.ResponseWriter, r *http.Request) {
+		chunk := make([]byte, ramChunkSize)
+		for i := range chunk {
+			chunk[i] = 1
+		}
+		ramMu.Lock()
+		ramChunks = append(ramChunks, chunk)
+		total := len(ramChunks)
+		ramMu.Unlock()
+
+		w.WriteHeader(http.StatusOK)
+		_, _ = fmt.Fprintf(w, "allocated 0.1 GiB, total held: %.1f GiB (%d chunks)\n", float64(total)*0.1, total)
+	})
+	http.HandleFunc("/cpu", func(w http.ResponseWriter, r *http.Request) {
+		iterations := 1_000_000
+		if n, err := strconv.Atoi(r.URL.Query().Get("n")); err == nil && n > 0 {
+			iterations = n
+		}
+
+		start := time.Now()
+		sum := sha256.Sum256([]byte("zerops"))
+		for i := 0; i < iterations; i++ {
+			sum = sha256.Sum256(sum[:])
+		}
+		elapsed := time.Since(start)
+
+		w.WriteHeader(http.StatusOK)
+		_, _ = fmt.Fprintf(w, "computed %x in %s (%d iterations)\n", sum, elapsed, iterations)
 	})
 	_ = http.ListenAndServe(":8080", nil)
 }
diff --git a/godummy/zerops.yml b/godummy/zerops.yml
index 14ad743..20d8506 100644
--- a/godummy/zerops.yml
+++ b/godummy/zerops.yml
@@ -1,15 +1,13 @@
 zerops:
   - setup: app
     build:
-      os: ubuntu
-      base: go@latest
+      base: ubuntu/go@latest
       buildCommands:
-        - go build -o app main.go
+        - go build -ldflags "-X main.BuildTime=$(date -u +%Y-%m-%dT%H:%M:%SZ)" -o app main.go
       cache: true
       deployFiles:
         - app
     run:
-      os: ubuntu
       base: ubuntu@latest
       ports:
         - port: 8080