Further optimizations

README.md

@@ -69,17 +69,17 @@ ok  	github.com/symbolicsoft/kyber-k2so	1.140s
 goos: linux
 goarch: amd64
 pkg: github.com/symbolicsoft/kyber-k2so
-BenchmarkKemKeypair512-8    	   28089	     45174 ns/op
-BenchmarkKemKeypair768-8    	   15427	     69505 ns/op
-BenchmarkKemKeypair1024-8   	   10000	    126179 ns/op
-BenchmarkKemEncrypt512-8    	   20823	     55941 ns/op
-BenchmarkKemEncrypt768-8    	   14752	     87413 ns/op
-BenchmarkKemEncrypt1024-8   	    9400	    127322 ns/op
-BenchmarkKemDecrypt512-8    	   17260	     71100 ns/op
-BenchmarkKemDecrypt768-8    	   10000	    100249 ns/op
-BenchmarkKemDecrypt1024-8   	    8785	    144723 ns/op
+BenchmarkKemKeypair512-8    	   28116	     41519 ns/op
+BenchmarkKemKeypair768-8    	   15864	     74150 ns/op
+BenchmarkKemKeypair1024-8   	   10000	    105946 ns/op
+BenchmarkKemEncrypt512-8    	   21409	     56336 ns/op
+BenchmarkKemEncrypt768-8    	   13629	     87541 ns/op
+BenchmarkKemEncrypt1024-8   	    9987	    131054 ns/op
+BenchmarkKemDecrypt512-8    	   17650	     65348 ns/op
+BenchmarkKemDecrypt768-8    	   12352	     99300 ns/op
+BenchmarkKemDecrypt1024-8   	    8913	    140804 ns/op
 PASS
-ok  	github.com/symbolicsoft/kyber-k2so	15.215s
+ok  	github.com/symbolicsoft/kyber-k2so	16.180s
 ```
 
 # About Kyber-K2SO

indcpa.go

@@ -185,7 +185,8 @@ func indcpaEncrypt(m []byte, publicKey []byte, coins []byte, paramsK int) ([]byt
 	v = polyInvNttToMont(v)
 	polyvecAdd(bp, ep, paramsK)
 	v = polyAdd(polyAdd(v, epp), k)
-	return indcpaPackCiphertext(polyvecReduce(bp, paramsK), polyReduce(v), paramsK), nil
+	polyvecReduce(bp, paramsK)
+	return indcpaPackCiphertext(bp, polyReduce(v), paramsK), nil
 }
 
 func indcpaDecrypt(c []byte, privateKey []byte, paramsK int) []byte {

poly.go

@@ -225,7 +225,7 @@ func polySub(a poly, b poly) poly {
 
 func polyvecCompress(a polyvec, paramsK int) []byte {
 	var r []byte
-	a = polyvecCSubQ(a, paramsK)
+	polyvecCSubQ(a, paramsK)
 	rr := 0
 	switch paramsK {
 	case 2:
@@ -335,18 +335,16 @@ func polyvecFromBytes(a []byte, paramsK int) polyvec {
 	return r
 }
 
-func polyvecNtt(r polyvec, paramsK int) polyvec {
+func polyvecNtt(r polyvec, paramsK int) {
 	for i := 0; i < paramsK; i++ {
 		r[i] = polyNtt(r[i])
 	}
-	return r
 }
 
-func polyvecInvNttToMont(r polyvec, paramsK int) polyvec {
+func polyvecInvNttToMont(r polyvec, paramsK int) {
 	for i := 0; i < paramsK; i++ {
 		r[i] = polyInvNttToMont(r[i])
 	}
-	return r
 }
 
 func polyvecPointWiseAccMontgomery(a polyvec, b polyvec, paramsK int) poly {
@@ -358,23 +356,20 @@ func polyvecPointWiseAccMontgomery(a polyvec, b polyvec, paramsK int) poly {
 	return polyReduce(r)
 }
 
-func polyvecReduce(r polyvec, paramsK int) polyvec {
+func polyvecReduce(r polyvec, paramsK int) {
 	for i := 0; i < paramsK; i++ {
 		r[i] = polyReduce(r[i])
 	}
-	return r
 }
 
-func polyvecCSubQ(r polyvec, paramsK int) polyvec {
+func polyvecCSubQ(r polyvec, paramsK int) {
 	for i := 0; i < paramsK; i++ {
 		r[i] = polyCSubQ(r[i])
 	}
-	return r
 }
 
-func polyvecAdd(a polyvec, b polyvec, paramsK int) polyvec {
+func polyvecAdd(a polyvec, b polyvec, paramsK int) {
 	for i := 0; i < paramsK; i++ {
 		a[i] = polyAdd(a[i], b[i])
 	}
-	return a
 }