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Improve performance by producing a binary bristol format in JS so that we don't use emscripten's super slow istringstream

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This commit is contained in:
Andrew Morris
2025-06-12 13:00:26 +10:00
parent 725d239731
commit 6ebafc07a8
8 changed files with 295 additions and 31 deletions
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23
programs/jslib.cpp
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@@ -187,31 +187,30 @@ public:
}
};
EM_JS(char*, get_circuit_raw, (int* lengthPtr), {
if (!Module.emp?.circuit) {
throw new Error("Module.emp.circuit is not defined in JavaScript.");
EM_JS(uint8_t*, get_circuit_raw, (int* lengthPtr), {
if (!Module.emp?.circuitBinary) {
throw new Error("Module.emp.circuitBinary is not defined in JavaScript.");
}
const circuitString = Module.emp.circuit; // Get the string from JavaScript
const length = lengthBytesUTF8(circuitString) + 1; // Calculate length including the null terminator
const circuitBinary = Module.emp.circuitBinary; // Get the string from JavaScript
// Allocate memory for the string
const strPtr = Module._js_char_malloc(length);
stringToUTF8(circuitString, strPtr, length);
// Allocate memory
const ptr = Module._js_malloc(circuitBinary.length);
Module.HEAPU8.set(circuitBinary, ptr);
// Set the length at the provided pointer location
setValue(lengthPtr, length, 'i32');
setValue(lengthPtr, circuitBinary.length, 'i32');
// Return the pointer
return strPtr;
return ptr;
});
emp::BristolFormat get_circuit() {
int length = 0;
char* circuit_raw = get_circuit_raw(&length);
uint8_t* circuit_raw = get_circuit_raw(&length);
emp::BristolFormat circuit;
circuit.from_str(circuit_raw);
circuit.from_buffer(circuit_raw, length);
free(circuit_raw);
return circuit;