sys.disk_available: speedup

Author: scivision

+stdlib/+sys/disk_available.m

@@ -3,15 +3,20 @@
 t = [];
 
 if ispc()
-  dl = extractBefore(stdlib.absolute(p), 2);
-  cmd = sprintf('pwsh -c "(Get-Volume -DriveLetter ''%s'').SizeRemaining"', dl);
+  cmd = sprintf('pwsh -c ([System.IO.DriveInfo]''%s'').AvailableFreeSpace', stdlib.absolute(p));
+  % r = stdlib.root_name(stdlib.absolute(p));
+  % cmd = sprintf('pwsh -c (Get-CimInstance -ClassName Win32_LogicalDisk -Filter \"DeviceID=''%s''\").FreeSpace', r);
+  % slower
+  % dl = extractBefore(stdlib.absolute(p), 2);
+  % cmd = sprintf('pwsh -c "(Get-Volume -DriveLetter ''%s'').SizeRemaining"', dl);
+  % slowest
 elseif ismac()
   cmd = sprintf('df -k "%s" | awk ''NR==2 {print $4*1024}''', p);
 else
   cmd = sprintf('df -B1 "%s" | awk ''NR==2 {print $4}''', p);
 end
 
-if stdlib.exists(p)
+if isunix() || stdlib.exists(p)
   [s, t] = system(cmd);
   if s == 0
     t = str2double(t);

+stdlib/+sys/inode.m

@@ -1,9 +1,6 @@
 %% SYS.INODE get file inode
 
 function [i, cmd] = inode(file)
-arguments
-  file (1,1) string
-end
 
 i = [];
 

example/BenchmarkDiskAvailable.m

@@ -0,0 +1,44 @@
+classdef (SharedTestFixtures={ matlab.unittest.fixtures.PathFixture("..")}) ...
+    BenchmarkDiskAvailable < matlab.perftest.TestCase
+
+properties
+exist = "."
+not_exist = tempname()
+fun = @stdlib.disk_available
+end
+
+properties(TestParameter)
+backend
+end
+
+methods (TestParameterDefinition, Static)
+function backend = setupBackend()
+  backend = init_backend('disk_available');
+end
+end
+
+
+methods (Test)
+
+function bench_exist(tc, backend)
+tc.startMeasuring()
+i = tc.fun(tc.exist, backend);
+tc.stopMeasuring()
+
+tc.verifyClass(i, 'uint64')
+tc.verifyGreaterThan(i, 0)
+end
+
+
+function bench_not_exist(tc, backend)
+tc.startMeasuring()
+i = tc.fun(tc.not_exist, backend);
+tc.stopMeasuring()
+
+tc.verifyClass(i, 'uint64')
+tc.assertEmpty(i)
+end
+
+end
+
+end

example/BenchmarkDiskAvailableRun.m

@@ -0,0 +1,20 @@
+function [r, s] =  BenchmarkDiskAvailableRun()
+tname = "BenchmarkDiskAvailable";
+
+%% Exist
+r.same = run_bench(tname + "/bench_exist");
+s.exist = sampleSummary(r.same);
+disp(sortrows(s.exist, "Median"))
+%% Not Exist
+r.not = run_bench(tname + "/bench_not_exist");
+s.not = sampleSummary(r.not);
+disp(sortrows(s.not, "Median"))
+
+end
+
+
+function result = run_bench(name)
+suite = testsuite(name);
+exp = matlab.perftest.TimeExperiment.limitingSamplingError(MaxSamples=20, RelativeMarginOfError=0.1);
+result = exp.run(suite);
+end

example/BenchmarkGetOwner.m

@@ -1,6 +1,12 @@
 classdef (SharedTestFixtures={ matlab.unittest.fixtures.PathFixture("..")}) ...
     BenchmarkGetOwner < matlab.perftest.TestCase
 
+properties
+exist = '.'
+not_exist = tempname()
+fun = @stdlib.get_owner
+end
+
 properties(TestParameter)
 backend
 end
@@ -16,7 +22,7 @@
 
 function bench_exist(tc, backend)
 tc.startMeasuring()
-o = stdlib.get_owner('.', backend);
+o = tc.fun(tc.exist, backend);
 tc.stopMeasuring()
 
 tc.verifyClass(o, 'string')
@@ -26,7 +32,7 @@ function bench_exist(tc, backend)
 
 function bench_not_exist(tc, backend)
 tc.startMeasuring()
-o = stdlib.get_owner('not-exist', backend);
+o = tc.fun(tc.not_exist, backend);
 tc.stopMeasuring()
 
 tc.verifyClass(o, 'string')