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2025-07-10 07:14:11 +08:00
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en/docs/chapter_array_and_linkedlist/ram_and_cache.md
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@@ -16,13 +16,13 @@ There are three types of storage devices in computers: <u>hard disk</u>, <u>rand
<div class="center-table" markdown>
| | Hard Disk | Memory | Cache |
| ---------- | -------------------------------------------------------------- | ------------------------------------------------------------------------ | ----------------------------------------------------------------------------------------------- |
| Usage | Long-term storage of data, including OS, programs, files, etc. | Temporary storage of currently running programs and data being processed | Stores frequently accessed data and instructions, reducing the number of CPU accesses to memory |
| Volatility | Data is not lost after power off | Data is lost after power off | Data is lost after power off |
| Capacity | Larger, TB level | Smaller, GB level | Very small, MB level |
| Speed | Slower, several hundred to thousands MB/s | Faster, several tens of GB/s | Very fast, several tens to hundreds of GB/s |
| Price | Cheaper, a few cents to a few dollars / GB | More expensive, tens to hundreds of dollars / GB | Very expensive, priced with CPU |
| | Hard Disk | Memory | Cache |
| ----------- | -------------------------------------------------------------- | ------------------------------------------------------------------------ | ----------------------------------------------------------------------------------------------- |
| Usage | Long-term storage of data, including OS, programs, files, etc. | Temporary storage of currently running programs and data being processed | Stores frequently accessed data and instructions, reducing the number of CPU accesses to memory |
| Volatility | Data is not lost after power off | Data is lost after power off | Data is lost after power off |
| Capacity | Larger, TB level | Smaller, GB level | Very small, MB level |
| Speed | Slower, several hundred to thousands MB/s | Faster, several tens of GB/s | Very fast, several tens to hundreds of GB/s |
| Price (USD) | Cheaper, a few cents / GB | More expensive, a few dollars / GB | Very expensive, priced with CPU |
</div>