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SlottedArrayBenchmarks.Hash_collisions uses a fixed size to make it comparable #347

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merged 2 commits into from
Jun 7, 2024
Merged

SlottedArrayBenchmarks.Hash_collisions uses a fixed size to make it comparable #347

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ad685b9
SlottedArrayBenchmarks.Hash_collisions uses a fixed size to make it c…
Scooletz Jun 7, 2024
db84e2e
fixes to aligned number
Scooletz Jun 7, 2024
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14 changes: 8 additions & 6 deletions src/Paprika.Benchmarks/SlottedArrayBenchmarks.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -15,8 +15,9 @@ public class SlottedArrayBenchmarks
private readonly byte[] _writable = new byte[Page.PageSize];
private readonly int _to;

// hash collisions are fixed in size to make them comparable
private readonly byte[] _hashCollisions = new byte[Page.PageSize];
private readonly int _hashCollisionsLength;
private const int HashCollisionsCount = NibblePath.KeccakNibbleCount;
private static readonly byte[] HashCollisionValue = new byte[13];

private readonly byte[] _copy0 = new byte[Page.PageSize];
Expand Down Expand Up @@ -53,11 +54,12 @@ public SlottedArrayBenchmarks()
var zeroes = NibblePath.FromKey(Keccak.Zero);
var hashCollisions = new SlottedArray(_hashCollisions);

_hashCollisionsLength = 0;

while (hashCollisions.TrySet(zeroes.SliceTo(_hashCollisionsLength), HashCollisionValue))
for (var i = 0; i <= HashCollisionsCount; i++)
{
_hashCollisionsLength++;
if (!hashCollisions.TrySet(zeroes.SliceTo(i), HashCollisionValue))
{
throw new Exception($"No place to set hash collision at {i}");
}
}
}

Expand Down Expand Up @@ -155,7 +157,7 @@ public int Hash_collisions()

var length = 0;

for (var i = 0; i < _hashCollisionsLength; i++)
for (var i = 0; i < HashCollisionsCount; i++)
{
if (map.TryGet(zeroes.SliceTo(i), out var value))
{
Expand Down
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