The Biggest Bottleneck in Laptops and SSD Performance Evaluation

Laptop's Biggest Bottleneck

CPU speed is about ten times faster than memory, and memory is hundreds of times faster than hard‑disk, making the hard‑disk the greatest bottleneck in a computer; improving disk I/O is the most effective way to boost overall speed.

SSD

As a non‑mechanical storage, SSD speed approaches that of memory and far exceeds traditional magnetic hard‑disks.

Cost

Recently, 128 GB SSDs are priced around 700 CNY, and the author purchased several for testing.

Performance Results

Test environment: Windows 7 + 2 GB RAM + SSD

Boot time: 22 seconds

Shutdown time: 8 seconds

Open Word: 3 seconds

Open Outlook: 6 seconds

Note: The machine only has 2 GB of RAM.

MLC vs. SLC

MLC (Multi‑Level Cell) and SLC (Single‑Level Cell) are two SSD technologies. SLC has lower density, higher price, faster speed, and longer write endurance, while MLC offers higher density, lower cost, slightly slower speed, and shorter write life. Generally, SLC is recommended for servers and MLC for desktop use.

Recommendation

For anyone dissatisfied with performance, the author suggests switching entirely to SSDs.

He Weiping

Qunar Travel Division – Search technology researcher and database researcher, translator of the first Chinese PostgreSQL manual and the third edition of Programming Perl, with extensive experience in search, distributed systems, databases, and cluster design.

Article originally from company wiki "Old He’s 1001 Nights"; please credit the source when reproducing.