Re: Feature request: Improve diff algorithm

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On Mon, Nov 21, 2016 at 8:56 AM, Jacob Keller <jacob.keller@xxxxxxxxx> wrote:
> On Mon, Nov 21, 2016 at 12:11 AM, KES <kes-kes@xxxxxxxxx> wrote:
>> Hi.
>>
>
> Hi,
>
>> I have some question about how diff works then give proposal:
>>
>> it will be very useful for each "symbol" store additional meta info as source line length. So in this case when git counter two equal sequence of commands it will do further comparison: Adds 23 chars deletes none VS adds 75 chars deletes 46
>>
>> Actually I got this:
>>
>> @@ -129,8 +132,9 @@ sub _preprocess_message {
>>  sub _process_message {
>>      my ($self, $message) = @_;
>>
>> -    my $method = ref($message) eq 'HASH' ? $message->{method} : undef;
>> +    my $time =  [ gettimeofday ];
>>
>> +    my $method = ref($message) eq 'HASH' ? $message->{method} : undef;
>>      return $self->send_error(ERROR_REQUEST_INVALID)
>>          unless defined($method);
>>
>> Instead of expected:
>> @@ -129,6 +132,8 @@ sub _preprocess_message {
>>  sub _process_message {
>>      my ($self, $message) = @_;
>>
>> +    my $time =  [ gettimeofday ];
>> +
>>      my $method = ref($message) eq 'HASH' ? $message->{method} : undef;
>> -
>>      return $self->send_error(ERROR_REQUEST_INVALID)
>>
>
> Have you tried the various options for git to search for smaller
> diffs? Or using the other diff algorithms such as histogram instead of
> patience?
>

The newest version of Git comes with a flag to move around the diff
better, based on the work at https://github.com/mhagger/diff-slider-tools



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