lines_count speed up

lib/git_stats/cli.rb

@@ -7,7 +7,7 @@ class GitStats::CLI
 
     repo_path, out_path = args
     GitStats::Generator.new(repo_path, out_path) { |g|
-      g.git_command_observer { |command| puts command }
+      g.git_command_observer { |command, result| puts "#{command}" }
     }.generate
   end
 

lib/git_stats/git_data/command.rb

@@ -9,8 +9,9 @@ module GitStats
       end
 
       def run
-        repo.git_command_observer.try(:call, @command)
-        in_repo { %x[#@command] }
+        result = in_repo { %x[#@command] }
+        repo.git_command_observer.try(:call, @command, result)
+        result
       end
 
       def in_repo

lib/git_stats/git_data/commit.rb

@@ -20,7 +20,9 @@ module GitStats
       end
 
       def lines_count
-        @lines_count ||= files.map(&:lines_count).sum
+        @lines_count ||= Command.new(repo, "git diff --shortstat `git hash-object -t tree /dev/null` #{self.hash}").run.lines.map do |line|
+          line[/(\d+) insertions?/, 1].to_i
+        end.sum
       end
 
       def short_stat

templates/index.haml

@@ -19,7 +19,7 @@
     %td= repo.commits.last.files_count
   %tr
     %td Total lines
-    %td= "#{repo.commits.last.files.map(&:lines_count).sum} lines (#{repo.short_stats.map(&:insertions).sum} insertions, #{repo.short_stats.map(&:deletions).sum} deletions)"
+    %td= "#{repo.commits.last.lines_count} lines (#{repo.short_stats.map(&:insertions).sum} insertions, #{repo.short_stats.map(&:deletions).sum} deletions)"
   %tr
     %td Total commits
     %td= repo.commits.size