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Optimize hashtable loading #216

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Aug 6, 2023
Merged

Optimize hashtable loading #216

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27 changes: 9 additions & 18 deletions Obsidian/Services/HashtableService.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -178,34 +178,25 @@ string checksum

public void LoadHashtable(string hashtablePath) {
using StreamReader reader = new(hashtablePath);
StringBuilder nameBuilder = new();

while (reader.EndOfStream is false) {
string line = reader.ReadLine();
string[] split = line.Split(' ');

ulong pathHash = ulong.Parse(split[0], NumberStyles.HexNumber);
nameBuilder = nameBuilder.AppendJoin(' ', split.Skip(1));

this.Hashes.TryAdd(pathHash, nameBuilder.ToString());

nameBuilder.Clear();
while (reader.ReadLine() is string line) {
var separatorIndex = line.IndexOf(' ');

ulong pathHash = ulong.Parse(line.AsSpan(0, separatorIndex), NumberStyles.HexNumber);

this.Hashes.TryAdd(pathHash, line[(separatorIndex+1)..]);
}
}

private static void LoadBinHashtable(string hashtablePath, Dictionary<uint, string> hashtable) {
using StreamReader reader = new(hashtablePath);
StringBuilder nameBuilder = new();

while (reader.EndOfStream is false) {
string line = reader.ReadLine();
string[] split = line.Split(' ');
while (reader.ReadLine() is string line) {
string[] split = line.Split(' ', 2);

uint hash = uint.Parse(split[0], NumberStyles.HexNumber);
nameBuilder = nameBuilder.AppendJoin(' ', split.Skip(1));

hashtable.TryAdd(hash, nameBuilder.ToString());
nameBuilder.Clear();
hashtable.TryAdd(hash, split[1]);
}
}

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