diff --git a/Documentation/gitattributes.txt b/Documentation/gitattributes.txt
index c19e64ea0ef..7e69f509d0a 100644
--- a/Documentation/gitattributes.txt
+++ b/Documentation/gitattributes.txt
@@ -736,7 +736,6 @@ String::
 	by the configuration variables in the "diff.foo" section of the
 	Git config file.
 
-
 Defining an external diff driver
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
@@ -758,6 +757,46 @@ with the above configuration, i.e. `j-c-diff`, with 7
 parameters, just like `GIT_EXTERNAL_DIFF` program is called.
 See linkgit:git[1] for details.
 
+Setting the internal diff algorithm
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The diff algorithm can be set through the `diff.algorithm` config key, but
+sometimes it may be helpful to set the diff algorithm by path. For example, one
+might wish to set a diff algorithm automatically for all `.json` files such that
+the user would not need to pass in a separate command line `--diff-algorithm` flag each
+time.
+
+First, in `.gitattributes`, you would assign the `diff` attribute for paths.
+
+*Git attributes*
+------------------------
+*.json diff=<name>
+------------------------
+
+Then, you would define a "diff.<name>.algorithm" configuration to specify the
+diff algorithm, choosing from `meyers`, `patience`, `minimal`, and `histogram`.
+
+*Git config*
+
+----------------------------------------------------------------
+[diff "<name>"]
+  algorithm = histogram
+----------------------------------------------------------------
+
+This diff algorithm applies to git-diff(1), including the `--stat` output.
+
+NOTE: If the `command` key also exists, then Git will treat this as an external
+diff and attempt to use the value set for `command` as an external program. For
+instance, the following config, combined with the above `.gitattributes` file,
+will result in `command` favored over `algorithm`.
+
+*Git config*
+
+----------------------------------------------------------------
+[diff "<name>"]
+  command = j-c-diff
+  algorithm = histogram
+----------------------------------------------------------------
 
 Defining a custom hunk-header
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/diff.c b/diff.c
index 92a0eab942e..24da439e56f 100644
--- a/diff.c
+++ b/diff.c
@@ -4456,15 +4456,11 @@ static void run_diff_cmd(const char *pgm,
 	const char *xfrm_msg = NULL;
 	int complete_rewrite = (p->status == DIFF_STATUS_MODIFIED) && p->score;
 	int must_show_header = 0;
+	struct userdiff_driver *drv = userdiff_find_by_path(o->repo->index, attr_path);
 
-
-	if (o->flags.allow_external) {
-		struct userdiff_driver *drv;
-
-		drv = userdiff_find_by_path(o->repo->index, attr_path);
+	if (o->flags.allow_external)
 		if (drv && drv->external)
 			pgm = drv->external;
-	}
 
 	if (msg) {
 		/*
@@ -4481,12 +4477,17 @@ static void run_diff_cmd(const char *pgm,
 		run_external_diff(pgm, name, other, one, two, xfrm_msg, o);
 		return;
 	}
-	if (one && two)
+	if (one && two) {
+		if (!o->xdl_opts_command_line)
+			if (drv && drv->algorithm)
+				set_diff_algorithm(o, drv->algorithm);
+
 		builtin_diff(name, other ? other : name,
 			     one, two, xfrm_msg, must_show_header,
 			     o, complete_rewrite);
-	else
+	} else {
 		fprintf(o->file, "* Unmerged path %s\n", name);
+	}
 }
 
 static void diff_fill_oid_info(struct diff_filespec *one, struct index_state *istate)
@@ -4583,6 +4584,10 @@ static void run_diffstat(struct diff_filepair *p, struct diff_options *o,
 	const char *name;
 	const char *other;
 
+	struct userdiff_driver *drv = userdiff_find_by_path(o->repo->index, p->one->path);
+	if (drv && drv->algorithm)
+		set_diff_algorithm(o, drv->algorithm);
+
 	if (DIFF_PAIR_UNMERGED(p)) {
 		/* unmerged */
 		builtin_diffstat(p->one->path, NULL, NULL, NULL,
@@ -5130,6 +5135,8 @@ static int diff_opt_diff_algorithm(const struct option *opt,
 		return error(_("option diff-algorithm accepts \"myers\", "
 			       "\"minimal\", \"patience\" and \"histogram\""));
 
+	options->xdl_opts_command_line = 1;
+
 	return 0;
 }
 
@@ -5157,6 +5164,8 @@ static int diff_opt_diff_algorithm_no_arg(const struct option *opt,
 		BUG("available diff algorithms include \"myers\", "
 			       "\"minimal\", \"patience\" and \"histogram\"");
 
+	options->xdl_opts_command_line = 1;
+
 	return 0;
 }
 
diff --git a/diff.h b/diff.h
index 41eb2c3d428..46b565abfd4 100644
--- a/diff.h
+++ b/diff.h
@@ -333,6 +333,8 @@ struct diff_options {
 	int prefix_length;
 	const char *stat_sep;
 	int xdl_opts;
+	/* If xdl_opts has been set via the command line. */
+	int xdl_opts_command_line;
 
 	/* see Documentation/diff-options.txt */
 	char **anchors;
diff --git a/t/lib-diff-alternative.sh b/t/lib-diff-alternative.sh
index 8d1e408bb58..2dc02bca873 100644
--- a/t/lib-diff-alternative.sh
+++ b/t/lib-diff-alternative.sh
@@ -105,10 +105,46 @@ index $file1..$file2 100644
  }
 EOF
 
+	cat >expect_diffstat <<EOF
+ file1 => file2 | 21 ++++++++++-----------
+ 1 file changed, 10 insertions(+), 11 deletions(-)
+EOF
+
 	STRATEGY=$1
 
+	test_expect_success "$STRATEGY diff from attributes" '
+		echo "file* diff=driver" >.gitattributes &&
+		git config diff.driver.algorithm "$STRATEGY" &&
+		test_must_fail git diff --no-index file1 file2 > output &&
+		cat expect &&
+		cat output &&
+		test_cmp expect output
+	'
+
+	test_expect_success "$STRATEGY diff from attributes has valid diffstat" '
+		echo "file* diff=driver" >.gitattributes &&
+		git config diff.driver.algorithm "$STRATEGY" &&
+		test_must_fail git diff --stat --no-index file1 file2 > output &&
+		test_cmp expect_diffstat output
+	'
+
 	test_expect_success "$STRATEGY diff" '
-		test_must_fail git diff --no-index "--$STRATEGY" file1 file2 > output &&
+		test_must_fail git diff --no-index "--diff-algorithm=$STRATEGY" file1 file2 > output &&
+		test_cmp expect output
+	'
+
+	test_expect_success "$STRATEGY diff command line precedence before attributes" '
+		echo "file* diff=driver" >.gitattributes &&
+		git config diff.driver.algorithm meyers &&
+		test_must_fail git diff --no-index "--diff-algorithm=$STRATEGY" file1 file2 > output &&
+		test_cmp expect output
+	'
+
+	test_expect_success "$STRATEGY diff attributes precedence before config" '
+		git config diff.algorithm default &&
+		echo "file* diff=driver" >.gitattributes &&
+		git config diff.driver.algorithm "$STRATEGY" &&
+		test_must_fail git diff --no-index file1 file2 > output &&
 		test_cmp expect output
 	'
 
diff --git a/userdiff.c b/userdiff.c
index d71b82feb74..ff25cfc4b4c 100644
--- a/userdiff.c
+++ b/userdiff.c
@@ -293,7 +293,7 @@ PATTERNS("scheme",
 	 "|([^][)(}{[ \t])+"),
 PATTERNS("tex", "^(\\\\((sub)*section|chapter|part)\\*{0,1}\\{.*)$",
 	 "\\\\[a-zA-Z@]+|\\\\.|[a-zA-Z0-9\x80-\xff]+"),
-{ "default", NULL, -1, { NULL, 0 } },
+{ "default", NULL, NULL, -1, { NULL, 0 } },
 };
 #undef PATTERNS
 #undef IPATTERN
@@ -394,6 +394,8 @@ int userdiff_config(const char *k, const char *v)
 		return parse_bool(&drv->textconv_want_cache, k, v);
 	if (!strcmp(type, "wordregex"))
 		return git_config_string(&drv->word_regex, k, v);
+	if (!strcmp(type, "algorithm"))
+		return git_config_string(&drv->algorithm, k, v);
 
 	return 0;
 }
diff --git a/userdiff.h b/userdiff.h
index aee91bc77e6..24419db6973 100644
--- a/userdiff.h
+++ b/userdiff.h
@@ -14,6 +14,7 @@ struct userdiff_funcname {
 struct userdiff_driver {
 	const char *name;
 	const char *external;
+	const char *algorithm;
 	int binary;
 	struct userdiff_funcname funcname;
 	const char *word_regex;
