I want to count 4 speed channels of rpm

each sensor has 360 pulses

if anyone is interested the code below will update 100 times a second and seems pretty accurate

So far i have only been able to count on one channel - i will program another teensy to pulse 4 channels

the code works up to approx 270 khz plenty fast enough for me

is this a good strategy for counting 4 speed channels ?

Code:
uint8_t pulse_pin1 = 11;
uint8_t pulse_pin2 = 12;

unsigned long NoOfPulses1=360;
unsigned long NoOfPulses2=360;
unsigned long pulseCount1=0;
unsigned long pulseCount2=0;
unsigned long Period1=0;
unsigned long Period2=0;
unsigned long Freq1=0;
unsigned long Freq2=0;


unsigned long RPM1=0.000;
unsigned long RPM2=0.000;
unsigned int DataStamp = 0;
unsigned int NowStamp = 0;


void setup() {
    pinMode(pulse_pin1, INPUT_PULLUP);
    pinMode(pulse_pin2, INPUT_PULLUP);
    Serial.begin(115200);
    delay(2000);
    DataStamp = micros();
     
    attachInterrupt(digitalPinToInterrupt(pulse_pin1), pulseCounting1, RISING);
    attachInterrupt(digitalPinToInterrupt(pulse_pin2), pulseCounting2, RISING); 

}

void pulseCounting1()
{
  pulseCount1++; 
}

void pulseCounting2()
{
  pulseCount2++;
}

void loop() {

 if (millis() > (DataStamp/1000 + 99)) {   // 100 samples per second

     NowStamp = micros();
  
     if (pulseCount1 > 0)  {
      Period1 = ( (NowStamp - DataStamp) ) ;
      Freq1 = ((pulseCount1 * Period1)/10000) ;
      RPM1 = (Freq1 * 60) / NoOfPulses1 ;
      Serial.print("Freq 1: ");Serial.println(Freq1);
      Serial.print("RPM 1: ");Serial.println(RPM1);
      pulseCount1=0;
     }

     if (pulseCount2 > 0)  {
      Period2 = ( (NowStamp - DataStamp) ) ;
      Freq2 = ((pulseCount2 * Period2)/10000) ;
      RPM2 = (Freq2 * 60) / NoOfPulses2 ;
      Serial.print("Freq 2: ");Serial.println(Freq2);
      Serial.print("RPM 2: ");Serial.println(RPM2);
      pulseCount2=0;
     }
     
     DataStamp = micros(); 
     
   }

  }