diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7d085109..e6424b7a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Change log
 
+## 0.9.16 on 2022/07/20
+
+### Improvement
+- [Experimental] Startup time reduced⌨💨  
+  We really hope all guys try this version and report to us if there's a problem of any kind🙏
+
 ## 0.9.15 on 2022/07/19
 
 ### Joystick🕹
diff --git a/src/main.c b/src/main.c
index 3ba26e95..7c3b89c7 100644
--- a/src/main.c
+++ b/src/main.c
@@ -84,34 +84,36 @@ char const *string_desc_arr[STRING_DESC_ARR_SIZE] =
  *   0x1234:0xABCD:productName
  *   ^^^^^^ ^^^^^^ ^^^^^^^^^^^
  *    VID    PID      Name
- *   - IDs' prefix should be `0x`, should NOT be `0X`
  *   - Length of productName should be less than or equal 32 bytes
  * and any other letter must not be included in the file.
  */
-#define PRK_CONF_LENGTH (7 + 7 + 32)
+#define PRK_CONF_MAX_LENGTH (7 + 7 + 33 + 2)
 static void
 configure_prk(void)
 {
+  static char prk_conf[PRK_CONF_MAX_LENGTH] = {0};
   DirEnt entry;
-  uint8_t buf[PRK_CONF_LENGTH + 1] = {0};
-  uint8_t vid[7] = {0};
-  uint8_t pid[7] = {0};
-  static char name[PRK_CONF_LENGTH - 14] = {0};
   msc_findDirEnt("PRK-CONFTXT", &entry);
   if (entry.Name[0] != '\0') {
-    if (entry.FileSize > PRK_CONF_LENGTH) return;
-    msc_loadFile(buf, &entry);
-    if (strncmp("0x", buf, 2) || strncmp(":0x", buf + 6, 3)) return;
-    memcpy(vid,  buf     , 6);
-    memcpy(pid,  buf +  7, 6);
-    memcpy(name, buf + 14, strlen(buf) - 14);
-    for (int i = 0; ; i++) {
-      if (name[i] == '\r' || name[i] == '\n') name[i] = '\0';
-      if (name[i] == '\0') break;
+    if (entry.FileSize > PRK_CONF_MAX_LENGTH) return;
+    msc_loadFile(prk_conf, &entry);
+    char *tok = strtok(prk_conf, ":");
+    for (int i = 0; i < 3; i++) {
+      if (tok == NULL) break;
+      switch (i) {
+        case 0:
+          desc_device.idVendor  = (uint16_t)strtol(tok, NULL, 16);
+          tok = strtok(NULL, ":");
+          break;
+        case 1:
+          desc_device.idProduct = (uint16_t)strtol(tok, NULL, 16);
+          tok = strtok(NULL, ": \t\n\r");
+          break;
+        case 2:
+          string_desc_arr[2] = (const char *)tok;
+          break;
+      }
     }
-    desc_device.idVendor  = (uint16_t)strtol(vid, NULL, 16);
-    desc_device.idProduct = (uint16_t)strtol(pid, NULL, 16);
-    string_desc_arr[2] = (const char *)name;
   }
 }
 
@@ -210,7 +212,7 @@ create_keymap_task(mrbc_tcb *tcb)
   if (entry.Name[0] != '\0') {
     RotaryEncoder_reset();
     uint32_t fileSize = entry.FileSize;
-    console_printf("Size of keymap.rb: %u\n", fileSize);
+    console_printf("keymap.rb size: %u\n", fileSize);
     if (fileSize < MAX_KEYMAP_SIZE) {
       keymap_rb = malloc(KEYMAP_PREFIX_SIZE + fileSize + 1);
       keymap_rb[KEYMAP_PREFIX_SIZE + fileSize] = '\0';
@@ -222,7 +224,7 @@ create_keymap_task(mrbc_tcb *tcb)
       si = StreamInterface_new(NULL, SUSPEND_TASK, STREAM_TYPE_MEMORY);
     }
   } else {
-    console_printf("No keymap.rb found.\n");
+    console_printf("No keymap.rb found!\n");
     si = StreamInterface_new(NULL, SUSPEND_TASK, STREAM_TYPE_MEMORY);
   }
   if (!Compiler_compile(p, si, NULL)) {
diff --git a/src/ruby/app/models/debounce.rb b/src/ruby/app/models/debounce.rb
index 361be988..fdad4cbb 100644
--- a/src/ruby/app/models/debounce.rb
+++ b/src/ruby/app/models/debounce.rb
@@ -4,7 +4,7 @@ class DebounceBase
   DEFAULT_THRESHOLD = 40
 
   def initialize
-    puts "Initializing #{self.class}."
+    puts "Init #{self.class}"
     @threshold = DEFAULT_THRESHOLD
     @now = 0
   end
diff --git a/src/ruby/app/models/keyboard.rb b/src/ruby/app/models/keyboard.rb
index b4355a8e..d50a0882 100644
--- a/src/ruby/app/models/keyboard.rb
+++ b/src/ruby/app/models/keyboard.rb
@@ -443,7 +443,7 @@ class Keyboard
 class Keyboard
 
   def initialize
-    puts "Initializing Keyboard."
+    puts "Init Keyboard"
     # mruby/c VM doesn't work with a CONSTANT to make another CONSTANT
     # steep doesn't allow dynamic assignment of CONSTANT
     @SHIFT_LETTER_THRESHOLD_A    = LETTER.index('A').to_i
@@ -595,7 +595,7 @@ def init_uart
   end
 
   def init_matrix_pins(matrix)
-    puts "Initializing GPIO."
+    puts "Init GPIO"
     init_uart
     @cols_size = 0
     @rows_size = matrix.size
@@ -980,7 +980,7 @@ def start!
     # default debounce algorithm will be applied
     self.set_debounce(@scan_mode == :direct ? :per_key : :per_row) unless @debouncer
 
-    puts "Keyboard task started."
+    puts "Keyboard started"
 
     # To avoid unintentional report on startup
     # which happens only on Sparkfun Pro Micro RP2040
diff --git a/src/ruby/app/models/rgb.rb b/src/ruby/app/models/rgb.rb
index 4e1df876..743b59d8 100644
--- a/src/ruby/app/models/rgb.rb
+++ b/src/ruby/app/models/rgb.rb
@@ -1,6 +1,6 @@
 class RGB
  def initialize(pin, underglow_size, backlight_size, is_rgbw = false)
-    puts "Initializing RGB."
+    puts "Init RGB"
     turn_off
     @fifo = Array.new
     # TODO: @underglow_size, @backlight_size
diff --git a/src/ruby/app/models/rotary_encoder.rb b/src/ruby/app/models/rotary_encoder.rb
index 715dafd8..65655cde 100644
--- a/src/ruby/app/models/rotary_encoder.rb
+++ b/src/ruby/app/models/rotary_encoder.rb
@@ -1,6 +1,6 @@
 class RotaryEncoder
  def initialize(pin_a, pin_b)
-    puts "Initializing RotaryEncoder ..."
+    puts "Init RotaryEncoder"
     @pin_a = pin_a
     @pin_b = pin_b
     @partner_keycode_cw = 0
diff --git a/src/ruby/app/models/via.rb b/src/ruby/app/models/via.rb
index 7731b80a..f855fe9a 100644
--- a/src/ruby/app/models/via.rb
+++ b/src/ruby/app/models/via.rb
@@ -33,7 +33,7 @@ class VIA
   VIA_FILENAME = "VIA_MAP TXT"
 
   def initialize
-    puts "Initializing VIA."
+    puts "Init VIA"
     @layer_count = 5
     @mode_keys = Hash.new
     @keymap_saved = true
diff --git a/src/ruby/app/tasks/rgb_task.rb b/src/ruby/app/tasks/rgb_task.rb
index 9add0a75..7d355ee5 100644
--- a/src/ruby/app/tasks/rgb_task.rb
+++ b/src/ruby/app/tasks/rgb_task.rb
@@ -1,6 +1,6 @@
-puts "RGB task started."
+puts "RGB started"
 
-3.times { sleep 1 }
+sleep 0.5
 
 while true
   unless $rgb
diff --git a/src/ruby/app/tasks/usb_task.rb b/src/ruby/app/tasks/usb_task.rb
index c44e0a54..f2ccd917 100644
--- a/src/ruby/app/tasks/usb_task.rb
+++ b/src/ruby/app/tasks/usb_task.rb
@@ -1,10 +1,10 @@
-2000.times do
+200.times do
   tud_task
   cdc_task
   sleep_ms 2
 end
 print "\e[2J\e[1;1H" # clear all & home
-puts "Welcome to PRK Firmware!\n\nTUD task started.\n"
+puts "PRK Firmware started!\n\n"
 autoreload_tick = 0
 
 $mutex = false
@@ -14,16 +14,14 @@
   cdc_task
   if autoreload_ready?
     if autoreload_tick == 0
-      puts "Autoreload is ready."
+      puts "Reloading keymap"
       $rgb.turn_off if $rgb
-      puts "Suspending keymap."
       suspend_keymap
       report_hid(0, "\000\000\000\000\000\000")
-      autoreload_tick = 500
+      autoreload_tick = 200
     elsif autoreload_tick == 1
-      puts "Trying to reload keymap."
       reload_keymap
-      500.times do
+      10.times do
         tud_task
         cdc_task
         sleep_ms 2