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CPU Scheduling Algorithms Compared – Which is the FASTEST? (FCFS vs SJF vs RR vs Priority)

🔍 In this in-depth analysis, we compare four major CPU scheduling algorithms—FCFS, SJF, Round Robin, and Priority-Based—to determine which one delivers the best performance in terms of average waiting time & turnaround time!

📌 Key Takeaways:
✔️ Why CPU Scheduling Matters? Maximizing efficiency in operating systems!
✔️ Algorithms Tested: FCFS, SJF, RR, Priority – how do they stack up?
✔️ 5 Unique Cases with varying CPU bursts (4, 3, 5, 2 → modified in each case).
✔️ Performance Metrics: Average waiting time vs turnaround time – which algorithm wins?
✔️ Real-World Implications: Which scheduler is best for low-latency vs high-throughput systems?

📊 Case Breakdown:
1️⃣ Case 1: Burst times = 4, 3, 5, 2
2️⃣ Case 2: Burst times = +1 from Case 1
3️⃣ Case 3: Burst times = -2 from Case 2
4️⃣ Case 4: Burst times = +3 from Case 3
5️⃣ Case 5: Burst times = +1 from Case 4


⚡ Findings:
Shortest Job First (SJF) often has the lowest waiting time!
Round Robin (RR) balances fairness & efficiency.
Priority-Based can cause starvation – is it worth it?
FCFS is simple but may underperform with mixed workloads.

🎯 Who Should Watch?
CS/IT students learning OS concepts
Software engineers optimizing system performance
Tech enthusiasts curious about CPU scheduling

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💬 Comment – Which algorithm do YOU think is the best?
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#CPUScheduling #OperatingSystems #FCFS #SJF #RoundRobin #PriorityScheduling #ComputerScience #Algorithms #TechExplained #performanceoptimization

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Comparative Analysis of Different CPU Scheduling Algorithms with Respect to Average Waiting Time and Average Turnaround Time

Layman Abstract :
CPU scheduling is a key function of an operating system that helps decide which task (or process) should be given access to the processor and for how long. The goal is to make the system run efficiently by reducing waiting time, speeding up response time, and using the CPU as effectively as possible. This paper looks at four well-known CPU scheduling methods: First-Come-First-Served (FCFS), Shortest Job First (SJF), Priority-Based (PB), and Round Robin (RR). Through five different example scenarios, each with four processes, the paper compares how each scheduling method performs in terms of average waiting time and average turnaround time. By analyzing the results from all five cases, the paper helps identify which scheduling algorithm is the fastest and most efficient under different conditions. This study helps understand how each algorithm works and which one might be best suited for improving overall system performance.

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