inode, device: 20x faster

Author: scivision

+stdlib/device.m

@@ -2,18 +2,32 @@
 %
 %%% Inputs
 % * file: path to file
+% * backend: backend to use
 %%% Outputs
 % * i: device index
 % * b: backend used
 
 function [i, b] = device(file, backend)
 arguments
   file string
-  backend (1,:) string = ["java", "python", "perl", "sys"]
+  backend (1,:) string = ["java", "python", "sys"]
 end
 
-o = stdlib.Backend(mfilename(), backend);
-i = o.func(file);
+for b = backend
+  switch b
+    case "java"
+      i = stdlib.java.device(file);
+    case "python"
+      i = stdlib.python.device(file);
+    case "sys"
+      i = stdlib.sys.device(file);
+    otherwise
+      error("stdlib:device:ValueError", "Unknown backend: %s", b)
+  end
+
+  if ~isempty(i)
+    return
+  end
+end
 
-b = o.backend;
 end

+stdlib/inode.m

@@ -2,24 +2,32 @@
 %
 %%% inputs
 % * file: path to check
+% * backend: backend to use
 %%% Outputs
 % * i: inode number
 % * b: backend used
 
 function [i, b] = inode(file, backend)
 arguments
   file string
-  backend (1,:) string = ["java", "python", "perl", "sys"]
+  backend (1,:) string = ["java", "python", "sys"]
 end
 
-o = stdlib.Backend(mfilename(), backend);
+for b = backend
+  switch b
+    case "java"
+      i = stdlib.java.inode(file);
+    case "python"
+      i = stdlib.python.inode(file);
+    case "sys"
+      i = stdlib.sys.inode(file);
+    otherwise
+      error("stdlib:inode:ValueError", "Unknown backend: %s", b)
+  end
 
-if isscalar(file)
-  i = o.func(file);
-else
-  i = arrayfun(o.func, file);
+  if ~isempty(i)
+    return
+  end
 end
 
-b = o.backend;
-
 end

+stdlib/+perl/device.m renamed to example/+perl/device.m

@@ -1,3 +1,6 @@
+%% PERL.INODE
+% several times slower than stdlib.sys.inode
+
 function [r, cmd] = inode(file)
 
 r = uint64.empty;

+stdlib/+perl/inode.m renamed to example/+perl/inode.m

@@ -130,8 +130,9 @@ function test_remove_file(tc)
 
 
 function test_device(tc, Po, B_device)
-i = stdlib.device(Po, B_device);
+[i, b] = stdlib.device(Po, B_device);
 tc.verifyClass(i, 'uint64')
+tc.assertEqual(char(b), B_device)
 
 if ~stdlib.exists(Po)
   tc.verifyEmpty(i)
@@ -144,8 +145,9 @@ function test_device(tc, Po, B_device)
 
 function test_inode(tc, Po, B_device)
 
-i = stdlib.inode(Po, B_device);
+[i, b] = stdlib.inode(Po, B_device);
 tc.verifyClass(i, 'uint64')
+tc.assertEqual(char(b), B_device)
 
 if ~stdlib.exists(Po)
   tc.verifyEmpty(i)