Cool MateEfficiency vs Performance
When to use each in English, with meaning, register, and examples.
Efficiency
Top 2,000 (common)C1noun
Performance
Top 1,000 (very common)B1noun
Most common: Performance
| Efficiency | Performance | |
|---|---|---|
| Pronunciation | 🇬🇧 /["/ɪˈfɪʃnsi/"]/🇺🇸 /["/ɪˈfɪʃnsi/"]/ | 🇬🇧 /["/pəˈfɔːməns/"]/🇺🇸 /["/pərˈfɔːrməns/"]/ |
| Meaning | How well a task is done with the least waste of time and resources. | How well someone does something, especially in a play or a competition. |
| Example | The efficiency of the new engine significantly reduces fuel consumption. | The performance of the team improved significantly after the new coach was hired. |
| Register | Neutral | Neutral |
| How common | Top 2,000 (common) | Top 1,000 (very common) |
| CEFR level | C1 | B1 |
| Part of speech | noun | noun |
| Collocations | ruthless, great, high, achieve, maintain, demonstrate, drive, measures, benefits, with efficiency, efficiency in, ruthless, great, high, achieve, maintain, demonstrate, drive, measures, benefits, with efficiency, efficiency in | live, public, evening, give, put on, stage, feature somebody/something, art, poetry, artist, in performance, brilliant, convincing, dazzling, deliver, give, produce, benchmark, indicator, level, performance as, performance from, performance on, a level of performance, a measure of performance, a standard of performance, high, maximum, optimal, affect, influence, assess, boost |
| Antonyms | inefficiency, wastefulness, unproductiveness | failure, inactivity |
| Common mistakes | Confused with 'efficacy', which refers to the ability to produce a desired result., Using 'efficient' instead of 'efficiency' incorrectly in phrases., Overusing in casual conversation where simpler terms like 'speed' might suffice. | Confused with 'performancer,' which is incorrect., Using 'performance' as a verb instead of a noun., Confusing types of performance, like sports vs. arts. |
| Usage notes | Use 'efficiency' in both formal and informal contexts when discussing productivity. Avoid using it in casual conversations that don't concern work or processes. | Use 'performance' when discussing shows, competitions, or work output. It's neutral, suitable for both casual and formal settings, but avoid in very casual contexts. |
Frequently asked questions: Efficiency vs Performance
What's the difference between Efficiency and Performance?
Efficiency: How well a task is done with the least waste of time and resources. Performance: How well someone does something, especially in a play or a competition.
Which is more common: Efficiency and Performance?
Performance is the most common in everyday English.
Are Efficiency and Performance the same CEFR level?
Efficiency: C1, Performance: B1 on the CEFR scale.
Can I use Efficiency and Performance interchangeably?
Not always. Efficiency and Performance are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.