diff --git a/go.mod b/go.mod
index 4455bb3..90d473b 100644
--- a/go.mod
+++ b/go.mod
@@ -5,19 +5,16 @@ go 1.22
 toolchain go1.23.4
 
 require (
-	github.com/Luzifer/rconfig v1.2.0
+	github.com/Luzifer/rconfig/v2 v2.5.2
 	github.com/influxdata/influxdb v1.11.8
 	github.com/sirupsen/logrus v1.9.3
 )
 
 require (
 	github.com/kr/pretty v0.3.0 // indirect
-	github.com/onsi/ginkgo v1.10.1 // indirect
-	github.com/onsi/gomega v1.7.0 // indirect
 	github.com/rogpeppe/go-internal v1.9.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
-	github.com/stretchr/testify v1.8.3 // indirect
 	golang.org/x/sys v0.28.0 // indirect
 	gopkg.in/validator.v2 v2.0.1 // indirect
-	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
diff --git a/go.sum b/go.sum
index 62a792c..121e4c6 100644
--- a/go.sum
+++ b/go.sum
@@ -1,15 +1,11 @@
-github.com/Luzifer/rconfig v1.2.0 h1:waD1sqasGVSQSrExpLrQ9Q1JmMaltrS391VdOjWXP/I=
-github.com/Luzifer/rconfig v1.2.0/go.mod h1:9pet6z2+mm/UAB0jF/rf0s62USfHNolzgR6Q4KpsJI0=
+github.com/Luzifer/rconfig/v2 v2.5.2 h1:4Bfp8mTrCCK/xghUmUbh/qtKiLZA6RC0tHTgqkNw1m4=
+github.com/Luzifer/rconfig/v2 v2.5.2/go.mod h1:HnqUWg+NQh60/neUqfMDDDo5d1v8UPuhwKR1HqM4VWQ=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
-github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
 github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
-github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
-github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
 github.com/influxdata/influxdb v1.11.8 h1:lX8MJDfk91O7nqzzonQkjk87gOeQy9V/Xp3gpELhG1s=
 github.com/influxdata/influxdb v1.11.8/go.mod h1:zRTAuk/Ie/V1LGxJUv8jfDmfv+ypz22lxfhc1MxC3rI=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
@@ -19,11 +15,6 @@ github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
-github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
-github.com/onsi/ginkgo v1.10.1 h1:q/mM8GF/n0shIN8SaAZ0V+jnLPzen6WIVZdiwrRlMlo=
-github.com/onsi/ginkgo v1.10.1/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
-github.com/onsi/gomega v1.7.0 h1:XPnZz8VVBHjVsy1vzJmRwIcSwiUO+JFfrv/xGiigmME=
-github.com/onsi/gomega v1.7.0/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/rogpeppe/go-internal v1.6.1/go.mod h1:xXDCJY+GAPziupqXw64V24skbSoqbTEfhy4qGm1nDQc=
@@ -35,33 +26,18 @@ github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/stretchr/testify v1.8.3 h1:RP3t2pwF7cMEbC1dqtB6poj3niw/9gnV4Cjg5oW5gtY=
-github.com/stretchr/testify v1.8.3/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
-golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.23.0 h1:7EYJ93RZ9vYSZAIb2x3lnuvqO5zneoD6IvWjuhfxjTs=
-golang.org/x/net v0.23.0/go.mod h1:JKghWKKOSdJwpW2GEx0Ja7fmaKnMsbu+MWVZTokSYmg=
-golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.28.0 h1:Fksou7UEQUWlKvIdsqzJmUmCX3cZuD2+P3XyyzwMhlA=
 golang.org/x/sys v0.28.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
-golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
-gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
-gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
-gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
-gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/validator.v2 v2.0.1 h1:xF0KWyGWXm/LM2G1TrEjqOu4pa6coO9AlWSf3msVfDY=
 gopkg.in/validator.v2 v2.0.1/go.mod h1:lIUZBlB3Im4s/eYp39Ry/wkR02yOPhZ9IwIRBjuPuG8=
-gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
-gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/main.go b/main.go
index 6fabaa4..ed00cda 100644
--- a/main.go
+++ b/main.go
@@ -7,7 +7,7 @@ import (
 
 	"github.com/sirupsen/logrus"
 
-	"github.com/Luzifer/rconfig"
+	"github.com/Luzifer/rconfig/v2"
 )
 
 const tsvPermission = 0o600
@@ -34,6 +34,7 @@ var (
 )
 
 func initApp() (err error) {
+	rconfig.AutoEnv(true)
 	if err = rconfig.ParseAndValidate(&cfg); err != nil {
 		return fmt.Errorf("parsing CLI params: %w", err)
 	}
diff --git a/spark.go b/spark.go
index 15ed8d0..a4f7685 100644
--- a/spark.go
+++ b/spark.go
@@ -6,15 +6,16 @@ import (
 	"math"
 	"net"
 	"strings"
+	"time"
 
 	"github.com/sirupsen/logrus"
 )
 
 const (
-	protocolVersion      uint16 = 0x00 // Protocol Version
-	blockSize            int64  = 200  // size (KB) of each block of data copied to/from remote
-	throughputTestLength uint   = 10   // length of time to conduct each throughput test
-	numPings             int    = 30   // number of pings to attempt
+	protocolVersion      = 0x00             // Protocol Version
+	blockSize            = 200              // size (KB) of each block of data copied to/from remote
+	throughputTestLength = 10 * time.Second // length of time to conduct each throughput test
+	numPings             = 30               // number of pings to attempt
 
 	kbps = 1024.0
 	mbps = 1024.0 * kbps
diff --git a/throughput.go b/throughput.go
index 091a644..3e90faf 100644
--- a/throughput.go
+++ b/throughput.go
@@ -1,20 +1,17 @@
 package main
 
 import (
-	"bytes"
 	"crypto/rand"
 	"fmt"
 	"io"
-	"net"
-	"syscall"
 	"time"
 
 	"github.com/sirupsen/logrus"
 )
 
 const (
-	throughputBufferSize     = 1024 * blockSize
-	throughputBufferSizeBits = throughputBufferSize * 8
+	bitsPerByte         = 8
+	throughputChunkSize = 1024 * blockSize
 )
 
 func (s *sparkClient) ExecuteThroughputTest(t *testResult) (err error) {
@@ -29,14 +26,7 @@ func (s *sparkClient) ExecuteThroughputTest(t *testResult) (err error) {
 	return nil
 }
 
-//nolint:gocyclo
 func (s *sparkClient) runSendTest(t *testResult) (err error) {
-	data := make([]byte, throughputBufferSize)
-	if _, err = rand.Read(data); err != nil {
-		return fmt.Errorf("gathering random data: %w", err)
-	}
-	dataReader := bytes.NewReader(data)
-
 	if err = s.connect(); err != nil {
 		return fmt.Errorf("establishing connection: %w", err)
 	}
@@ -50,52 +40,10 @@ func (s *sparkClient) runSendTest(t *testResult) (err error) {
 		return fmt.Errorf("sending RCV command: %w", err)
 	}
 
-	var (
-		blockCount int64
-		totalStart = time.Now()
-	)
-
-	for {
-		start := time.Now()
-
-		if _, err = io.Copy(s.conn, dataReader); err != nil {
-			// If we get any of these errors, it probably just means that the server closed the connection
-			if err == io.EOF || err == io.ErrClosedPipe || err == syscall.EPIPE {
-				break
-			}
-
-			if operr, ok := err.(*net.OpError); ok {
-				logrus.Printf("%s", operr.Err)
-			}
-
-			if operr, ok := err.(*net.OpError); ok && operr.Err.Error() == syscall.ECONNRESET.Error() {
-				break
-			}
-
-			return fmt.Errorf("copying data: %w", err)
-		}
-
-		bps := float64(throughputBufferSizeBits) / (float64(time.Since(start).Nanoseconds()) / float64(time.Second.Nanoseconds()))
-		if bps < t.Send.Min {
-			t.Send.Min = bps
-		}
-		if bps > t.Send.Max {
-			t.Send.Max = bps
-		}
-		blockCount++
-
-		if _, err := dataReader.Seek(0, 0); err != nil {
-			return fmt.Errorf("seeking data reader: %w", err)
-		}
-
-		if time.Since(totalStart) > time.Duration(throughputTestLength)*time.Second {
-			break
-		}
+	if t.Send.Min, t.Send.Max, t.Send.Avg, err = s.runThroughputTest(rand.Reader, s.conn); err != nil {
+		return fmt.Errorf("testing throughput: %w", err)
 	}
 
-	// average bit per second
-	t.Send.Avg = float64(throughputBufferSizeBits) / (float64(time.Since(totalStart).Nanoseconds()) / float64(time.Second.Nanoseconds()))
-
 	return nil
 }
 
@@ -113,43 +61,44 @@ func (s *sparkClient) runRecvTest(t *testResult) (err error) {
 		return fmt.Errorf("writing SND command: %w", err)
 	}
 
+	if t.Receive.Min, t.Receive.Max, t.Receive.Avg, err = s.runThroughputTest(s.conn, io.Discard); err != nil {
+		return fmt.Errorf("testing throughput: %w", err)
+	}
+
+	return nil
+}
+
+func (*sparkClient) runThroughputTest(src io.Reader, dst io.Writer) (minT, maxT, avgT float64, err error) {
 	var (
-		blockCount int64
-		totalStart = time.Now()
+		dataTxBytes int64
+		testStart   = time.Now()
 	)
 
 	for {
-		start := time.Now()
+		segmentStart := time.Now()
 
-		if _, err = io.CopyN(io.Discard, s.conn, throughputBufferSize); err != nil {
-			// If we get any of these errors, it probably just means that the server closed the connection
-			if err == io.EOF || err == io.ErrClosedPipe || err == syscall.EPIPE {
-				break
-			}
-
-			if operr, ok := err.(*net.OpError); ok && operr.Err.Error() == syscall.ECONNRESET.Error() {
-				break
-			}
-
-			return fmt.Errorf("copying data: %w", err)
+		n, err := io.CopyN(dst, src, throughputChunkSize)
+		if err != nil {
+			return 0, 0, 0, fmt.Errorf("copying data: %w", err)
 		}
 
-		bps := float64(throughputBufferSizeBits) / (float64(time.Since(start).Nanoseconds()) / float64(time.Second.Nanoseconds()))
-		if bps < t.Receive.Min {
-			t.Receive.Min = bps
-		}
-		if bps > t.Receive.Max {
-			t.Receive.Max = bps
-		}
-		blockCount++
+		dataTxBytes += n
 
-		if time.Since(totalStart) > time.Duration(throughputTestLength)*time.Second {
+		bps := float64(n*bitsPerByte) / float64(time.Since(segmentStart).Seconds())
+		if bps < minT {
+			minT = bps
+		}
+		if bps > maxT {
+			maxT = bps
+		}
+
+		if time.Since(testStart) > throughputTestLength {
 			break
 		}
 	}
 
 	// average bit per second
-	t.Receive.Avg = float64(throughputBufferSizeBits) / (float64(time.Since(totalStart).Nanoseconds()) / float64(time.Second.Nanoseconds()))
+	avgT = float64(dataTxBytes*bitsPerByte) / float64(time.Since(testStart).Seconds())
 
-	return nil
+	return minT, maxT, avgT, nil
 }