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Optimize string memory usage. Use Spans and StringBuilders where possible (#3933)

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* Optimize string memory usage. Use ReadOnlySpan<char> and StringBuilder where possible.

* Fix copypaste error

* Code generator review fixes

* Use if statement instead of switch

* Code style fixes

Co-authored-by: TSRBerry <20988865+TSRBerry@users.noreply.github.com>

* Another code style fix

* Styling fix

Co-authored-by: Mary-nyan <thog@protonmail.com>

* Styling fix

Co-authored-by: gdkchan <gab.dark.100@gmail.com>

Co-authored-by: TSRBerry <20988865+TSRBerry@users.noreply.github.com>
Co-authored-by: Mary-nyan <thog@protonmail.com>
Co-authored-by: gdkchan <gab.dark.100@gmail.com>
This commit is contained in:
Andrey Sukharev 2023-01-19 01:25:16 +03:00 • committed by GitHub
parent f449895e6d
commit ae4324032a
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GPG key ID: 4AEE18F83AFDEB23
19 changed files with 118 additions and 81 deletions
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26
Ryujinx.HLE/HOS/Diagnostics/Demangler/Demangler.cs
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@ -32,9 +32,9 @@ namespace Ryujinx.HLE.HOS.Diagnostics.Demangler
private bool ConsumeIf(string toConsume)
{
string mangledPart = Mangled.Substring(_position);
var mangledPart = Mangled.AsSpan(_position);
if (mangledPart.StartsWith(toConsume))
if (mangledPart.StartsWith(toConsume.AsSpan()))
{
_position += toConsume.Length;
@ -44,14 +44,14 @@ namespace Ryujinx.HLE.HOS.Diagnostics.Demangler
return false;
}
private string PeekString(int offset = 0, int length = 1)
private ReadOnlySpan<char> PeekString(int offset = 0, int length = 1)
{
if (_position + offset >= length)
{
return null;
}
return Mangled.Substring(_position + offset, length);
return Mangled.AsSpan(_position + offset, length);
}
private char Peek(int offset = 0)
@ -101,8 +101,8 @@ namespace Ryujinx.HLE.HOS.Diagnostics.Demangler
private int ParseSeqId()
{
string part = Mangled.Substring(_position);
int seqIdLen = 0;
ReadOnlySpan<char> part = Mangled.AsSpan(_position);
int seqIdLen = 0;
for (; seqIdLen < part.Length; seqIdLen++)
{
@ -114,7 +114,7 @@ namespace Ryujinx.HLE.HOS.Diagnostics.Demangler
_position += seqIdLen;
return FromBase36(part.Substring(0, seqIdLen));
return FromBase36(new string(part[..seqIdLen]));
}
// <substitution> ::= S <seq-id> _
@ -900,8 +900,8 @@ namespace Ryujinx.HLE.HOS.Diagnostics.Demangler
private int ParsePositiveNumber()
{
string part = Mangled.Substring(_position);
int numberLength = 0;
ReadOnlySpan<char> part = Mangled.AsSpan(_position);
int numberLength = 0;
for (; numberLength < part.Length; numberLength++)
{
@ -918,7 +918,7 @@ namespace Ryujinx.HLE.HOS.Diagnostics.Demangler
return -1;
}
return int.Parse(part.AsSpan(0, numberLength));
return int.Parse(part[..numberLength]);
}
private string ParseNumber(bool isSigned = false)
@ -933,8 +933,8 @@ namespace Ryujinx.HLE.HOS.Diagnostics.Demangler
return null;
}
string part = Mangled.Substring(_position);
int numberLength = 0;
ReadOnlySpan<char> part = Mangled.AsSpan(_position);
int numberLength = 0;
for (; numberLength < part.Length; numberLength++)
{
@ -946,7 +946,7 @@ namespace Ryujinx.HLE.HOS.Diagnostics.Demangler
_position += numberLength;
return part.Substring(0, numberLength);
return new string(part[..numberLength]);
}
// <source-name> ::= <positive length number> <identifier>