snapshot

libraries/audio-tools/examples/tests/performance/file-speeds-vfssdmmc/file-speeds-vfssdmmc.ino

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+#define AUDIOBOARD_SD
+#include "AudioTools.h"
+#include "AudioTools/Disk/VFSFile.h"
+#include "AudioTools/Disk/VFS_SDMMC.h"
+
+const size_t max_len = 1024 * 100;
+uint8_t *data = nullptr;
+int len[] = { 1, 5, 10, 25, 100, 256, 512, 1024, 1024 * 10, 1024 * 100 };
+size_t totalSize = 1024 * 1024 * 1;
+const char* test_file = "/test.txt";
+
+void testWrite(Stream& file, int writeSize, int totalSize) {
+  memset(data, 0, max_len);
+  int32_t start = millis();
+  while (totalSize > 0) {
+    int written = file.write(data, min(writeSize, totalSize));
+    //Serial.println(written);
+    //assert(written > 0);
+    totalSize -= written;
+  }
+}
+
+void testRead(Stream& file, int readSize, int totalSize) {
+  memset(data, 0, max_len);
+  while (totalSize > 0) {
+    int read = file.readBytes(data, min(readSize, totalSize));
+    //assert(read>0);
+    totalSize -= read;
+  }
+}
+
+void logTime(uint32_t start, int i, const char* name, const char* op) {
+  int32_t time = millis() - start;
+  float thru = (float)totalSize / (float)time / 1000.0;
+  Serial.printf("%s, %s, %d, %d, %f\n", op, name, i, time, thru);
+}
+
+template<typename SD, typename Open>
+void testFS(const char* name, SD& sd, Open write, Open read) {
+  while (!sd.begin()) {
+    Serial.print(name);
+    Serial.println(" error");
+    delay(1000);
+  }
+
+  for (int i : len) {
+    int32_t start = millis();
+    auto file = sd.open(test_file, write);
+    file.seek(0);
+    assert(file);
+    testWrite(file, i, totalSize);
+    file.close();
+    logTime(start, i, name, "Write");
+  }
+  for (int i : len) {
+    int32_t start = millis();
+    auto file = sd.open(test_file, read);
+    assert(file);
+    testRead(file, i, totalSize);
+    file.close();
+    logTime(start, i, name, "Read");
+  }
+  sd.end();
+}
+
+void setup() {
+  Serial.begin(115200);
+
+  VFS_SDMMC sdmmc;
+
+  data = new uint8_t[max_len];
+  assert(data!=nullptr);
+
+ // testFS<VFS_SDSPI, FileMode>("VFS_SDSPI", sd, VFS_FILE_WRITE, VFS_FILE_READ);
+  testFS<VFS_SDMMC, FileMode>("VFS_SDMMC", sdmmc, VFS_FILE_WRITE, VFS_FILE_READ);
+}
+
+void loop() {}

libraries/audio-tools/examples/tests/performance/file-speeds-vfssdmmc/result.txt

@@ -0,0 +1,21 @@
+
+Write, VFS_SDMMC, 1, 2478, 0.423154
+Write, VFS_SDMMC, 5, 2363, 0.443748
+Write, VFS_SDMMC, 10, 2342, 0.447727
+Write, VFS_SDMMC, 25, 2336, 0.448877
+Write, VFS_SDMMC, 100, 2331, 0.449840
+Write, VFS_SDMMC, 256, 2337, 0.448685
+Write, VFS_SDMMC, 512, 2325, 0.451000
+Write, VFS_SDMMC, 1024, 2335, 0.449069
+Write, VFS_SDMMC, 10240, 2337, 0.448685
+Write, VFS_SDMMC, 102400, 2336, 0.448877
+Read, VFS_SDMMC, 1, 1808, 0.579965
+Read, VFS_SDMMC, 5, 827, 1.267928
+Read, VFS_SDMMC, 10, 705, 1.487342
+Read, VFS_SDMMC, 25, 631, 1.661769
+Read, VFS_SDMMC, 100, 594, 1.765279
+Read, VFS_SDMMC, 256, 508, 2.064126
+Read, VFS_SDMMC, 512, 467, 2.245345
+Read, VFS_SDMMC, 1024, 277, 3.785473
+Read, VFS_SDMMC, 10240, 88, 11.915637
+Read, VFS_SDMMC, 102400, 69, 15.196754