fix: lower memory usage a bit by disabling memory profiling

As of now, we're not using Go profiling, so it's safe to disable it to
save some memory and CPU costs. Once we start using it, we can re-enable
it conditionally.

Each process allocates around 1.4MiB on amd64 for memory profiling
buckets.

Signed-off-by: Andrey Smirnov <smirnov.andrey@gmail.com>

internal/app/apid/main.go

@@ -8,6 +8,7 @@ import (
 	"flag"
 	"log"
 	"regexp"
+	"runtime"
 	"strings"
 
 	"github.com/talos-systems/grpc-proxy/proxy"
@@ -28,6 +29,9 @@ import (
 var endpoints *string
 
 func init() {
+	// Explicitly disable memory profiling to save around 1.4MiB of memory.
+	runtime.MemProfileRate = 0
+
 	log.SetFlags(log.Lshortfile | log.Ldate | log.Lmicroseconds | log.Ltime)
 
 	endpoints = flag.String("endpoints", "", "the IPs of the control plane nodes")

internal/app/init/main.go

@@ -10,6 +10,7 @@ import (
 	"log"
 	"os"
 	"os/signal"
+	"runtime"
 	"syscall"
 	"time"
 
@@ -23,6 +24,11 @@ import (
 	"github.com/talos-systems/talos/pkg/version"
 )
 
+func init() {
+	// Explicitly disable memory profiling to save around 1.4MiB of memory.
+	runtime.MemProfileRate = 0
+}
+
 func run() (err error) {
 	// Mount the pseudo devices.
 	pseudo, err := mount.PseudoMountPoints()

internal/app/machined/main.go

@@ -14,6 +14,7 @@ import (
 	"net/url"
 	"os"
 	"os/signal"
+	goruntime "runtime"
 	"syscall"
 	"time"
 
@@ -36,6 +37,9 @@ import (
 )
 
 func init() {
+	// Explicitly disable memory profiling to save around 1.4MiB of memory.
+	goruntime.MemProfileRate = 0
+
 	// Explicitly set the default http client transport to work around proxy.Do
 	// once. This is the http.DefaultTransport with the Proxy func overridden so
 	// that the environment variables with be reread/initialized each time the

internal/app/networkd/main.go

@@ -7,6 +7,7 @@ package main
 import (
 	"flag"
 	"log"
+	"runtime"
 
 	"github.com/talos-systems/talos/internal/app/networkd/pkg/networkd"
 	"github.com/talos-systems/talos/internal/app/networkd/pkg/reg"
@@ -16,6 +17,9 @@ import (
 )
 
 func init() {
+	// Explicitly disable memory profiling to save around 1.4MiB of memory.
+	runtime.MemProfileRate = 0
+
 	log.SetFlags(log.Lshortfile | log.Ldate | log.Lmicroseconds | log.Ltime)
 
 	flag.Parse()

internal/app/routerd/main.go

@@ -6,6 +6,7 @@ package main
 
 import (
 	"log"
+	"runtime"
 
 	"github.com/talos-systems/grpc-proxy/proxy"
 	"google.golang.org/grpc"
@@ -17,6 +18,11 @@ import (
 	"github.com/talos-systems/talos/pkg/startup"
 )
 
+func init() {
+	// Explicitly disable memory profiling to save around 1.4MiB of memory.
+	runtime.MemProfileRate = 0
+}
+
 func main() {
 	log.SetFlags(log.Lshortfile | log.Ldate | log.Lmicroseconds | log.Ltime)
 

internal/app/timed/main.go

@@ -7,6 +7,7 @@ package main
 import (
 	"flag"
 	"log"
+	"runtime"
 
 	"github.com/talos-systems/talos/internal/app/timed/pkg/ntp"
 	"github.com/talos-systems/talos/internal/app/timed/pkg/reg"
@@ -26,6 +27,9 @@ const (
 )
 
 func init() {
+	// Explicitly disable memory profiling to save around 1.4MiB of memory.
+	runtime.MemProfileRate = 0
+
 	log.SetFlags(log.Lshortfile | log.Ldate | log.Lmicroseconds | log.Ltime)
 
 	flag.Parse()

internal/app/trustd/main.go

@@ -8,6 +8,7 @@ import (
 	"flag"
 	"log"
 	stdlibnet "net"
+	"runtime"
 
 	"github.com/talos-systems/crypto/tls"
 	"github.com/talos-systems/net"
@@ -24,6 +25,9 @@ import (
 )
 
 func init() {
+	// Explicitly disable memory profiling to save around 1.4MiB of memory.
+	runtime.MemProfileRate = 0
+
 	log.SetFlags(log.Lshortfile | log.Ldate | log.Lmicroseconds | log.Ltime)
 
 	flag.Parse()