Use 1.23*size + 32

Author: thomasmueller

src/xorfilter.h

@@ -58,7 +58,7 @@ class XorFilter {
   explicit XorFilter(const size_t size) {
     hasher = new HashFamily();
     this->size = size;
-    this->arrayLength = 3 + 1.23 * size;
+    this->arrayLength = 32 + 1.23 * size;
     this->blockLength = arrayLength / 3;
     fingerprints = new FingerprintType[arrayLength]();
     std::fill_n(fingerprints, arrayLength, 0);

src/xorfilter_2.h

@@ -73,7 +73,7 @@ class XorFilter2 {
   explicit XorFilter2(const size_t size) {
     hasher = new HashFamily();
     this->size = size;
-    this->arrayLength = 3 + 1.23 * size;
+    this->arrayLength = 32 + 1.23 * size;
     this->blockLength = arrayLength / 3;
     fingerprints = new FingerprintStorageType(arrayLength);
   }

src/xorfilter_2n.h

@@ -68,7 +68,7 @@ class XorFilter2n {
   explicit XorFilter2n(const size_t size) {
     hasher = new HashFamily();
     this->size = size;
-    this->arrayLength = 3 + 1.23 * size;
+    this->arrayLength = 32 + 1.23 * size;
     this->blockLength = 1;
     while (this->blockLength < arrayLength / 3) {
         this->blockLength *= 2;

src/xorfilter_plus.h

@@ -201,7 +201,7 @@ class XorFilterPlus {
   explicit XorFilterPlus(const size_t size) {
     hasher = new HashFamily();
     this->size = size;
-    this->arrayLength = 3 + 1.23 * size;
+    this->arrayLength = 32 + 1.23 * size;
     this->blockLength = arrayLength / 3;
   }