Add a raw C loop that calculates "itersum" without any context-switching.#28
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Add a raw C loop that calculates "itersum" without any context-switching.#28
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dhil
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Mar 20, 2026
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| int32_t result = 0, i = 0; | ||
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| while (i++ < max) { | ||
| result += (int32_t)(intptr_t)i; | ||
| } |
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I think this may work with -O2:
Suggested change
| int32_t result = 0, i = 0; | |
| while (i++ < max) { | |
| result += (int32_t)(intptr_t)i; | |
| } | |
| int32_t result = 0; | |
| for (int32_t i = 0; i < max; ++i) { | |
| __asm__("local.get %1\n" | |
| "local.get %2\n" | |
| "i32.add\n" | |
| "local.set %2\n" | |
| : "=r"(result) : "r"(i), "r"(result)); | |
| } |
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This is the "speed of light"