Revisions to Comparing two byte arrays in .NET

Question Protected by Pavneet_Singh

occurred Aug 11, 2018 at 17:09

replaced http://stackoverflow.com/ with https://stackoverflow.com/

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edited May 23, 2017 at 12:34

URL Rewriter Bot

How can I do this fast?

Sure I can do this:

static bool ByteArrayCompare(byte[] a1, byte[] a2)
{
    if (a1.Length != a2.Length)
        return false;

    for (int i=0; i<a1.Length; i++)
        if (a1[i]!=a2[i])
            return false;

    return true;
}

But I'm looking for either a BCL function or some highly optimized proven way to do this.

java.util.Arrays.equals((sbyte[])(Array)a1, (sbyte[])(Array)a2);

works nicely, but it doesn't look like that would work for x64.

Note my super-fast answer here here.

How can I do this fast?

Sure I can do this:

static bool ByteArrayCompare(byte[] a1, byte[] a2)
{
    if (a1.Length != a2.Length)
        return false;

    for (int i=0; i<a1.Length; i++)
        if (a1[i]!=a2[i])
            return false;

    return true;
}

But I'm looking for either a BCL function or some highly optimized proven way to do this.

java.util.Arrays.equals((sbyte[])(Array)a1, (sbyte[])(Array)a2);

works nicely, but it doesn't look like that would work for x64.

Note my super-fast answer here.

How can I do this fast?

Sure I can do this:

static bool ByteArrayCompare(byte[] a1, byte[] a2)
{
    if (a1.Length != a2.Length)
        return false;

    for (int i=0; i<a1.Length; i++)
        if (a1[i]!=a2[i])
            return false;

    return true;
}

But I'm looking for either a BCL function or some highly optimized proven way to do this.

java.util.Arrays.equals((sbyte[])(Array)a1, (sbyte[])(Array)a2);

works nicely, but it doesn't look like that would work for x64.

Note my super-fast answer here.

Copy edited. Added some context. Removed meta (this belongs in comments). Removed historical information (e.g. ref. <http://meta.stackexchange.com/a/230693> and <http://meta.stackoverflow.com/questions/266164>).

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edited Jun 28, 2015 at 23:41

Peter Mortensen

31.4k
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134

How can I do this fast? Sure

Sure I can do this:

static bool ByteArrayCompare(byte[] a1, byte[] a2) 
{
    if (a1.Length !=a2= a2.Length)
        return false;

    for (int i=0; i<a1.Length; i++)
        if (a1[i]!=a2[i])
            return false;

    return true;
}

butBut I'm looking for either a BCLBCL function or some highly optimized proven way to do this.

[Edit]Thanks to JasonBunting and aku for their input.

java.util.Arrays.equals((sbyte[])(Array)a1, (sbyte[])(Array)a2);

works nicely, but it doesn't look like that would work for x64.

[Edit] Note my super-fast answer here.

How can I do this fast? Sure I can do this:

static bool ByteArrayCompare(byte[] a1, byte[] a2) 
{
  if(a1.Length!=a2.Length)
    return false;

  for(int i=0; i<a1.Length; i++)
    if(a1[i]!=a2[i])
      return false;

  return true;
}

but I'm looking for either a BCL function or some highly optimized proven way to do this.

[Edit]Thanks to JasonBunting and aku for their input.

java.util.Arrays.equals((sbyte[])(Array)a1, (sbyte[])(Array)a2);

works nicely, but it doesn't look like that would work for x64.

[Edit] Note my super-fast answer here.

How can I do this fast?

Sure I can do this:

static bool ByteArrayCompare(byte[] a1, byte[] a2)
{
    if (a1.Length != a2.Length)
        return false;

    for (int i=0; i<a1.Length; i++)
        if (a1[i]!=a2[i])
            return false;

    return true;
}

But I'm looking for either a BCL function or some highly optimized proven way to do this.

java.util.Arrays.equals((sbyte[])(Array)a1, (sbyte[])(Array)a2);

works nicely, but it doesn't look like that would work for x64.

Note my super-fast answer here.

Great answer.. now it's searchable by tags...

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edited Dec 17, 2012 at 12:26

makerofthings7

61.8k
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added 99 characters in body; deleted 31 characters in body; added 40 characters in body; deleted 9 characters in body

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edited Aug 16, 2012 at 17:36

Hafthor

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moved my answer to an answer and accepted it to make it clear which one I preferred.

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edited Jan 10, 2012 at 18:13

Hafthor

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edited tags

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edited Sep 4, 2008 at 17:09

Daniel Jennings

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added 163 characters in body

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edited Sep 4, 2008 at 17:05

Hafthor

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edited body

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edited Sep 4, 2008 at 9:57

Hafthor

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added 994 characters in body

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edited Sep 4, 2008 at 9:52

Hafthor

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asked Sep 4, 2008 at 7:33

Hafthor

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