chore: import upstream snapshot with attribution

2026-07-13 12:28:05 +08:00
commit 41cb1c0170
1830 changed files with 38276124 additions and 0 deletions
@@ -0,0 +1,96 @@
+/*
+ * test_py_lsp_scale.c — measure scaling behavior at 100 / 500 / 2000
+ * classes-and-calls. Asserts that doubling the input doesn't more than
+ * 4x the runtime (catches accidental O(n^2) in the resolver).
+ */
+#include "test_framework.h"
+#include "cbm.h"
+#include "lsp/py_lsp.h"
+#include <time.h>
+
+static double elapsed_ms(struct timespec t0, struct timespec t1) {
+    double s = (double)(t1.tv_sec - t0.tv_sec);
+    double ns = (double)(t1.tv_nsec - t0.tv_nsec);
+    return s * 1000.0 + ns / 1000000.0;
+}
+
+/* Build N synthetic class/call pairs into an arena-backed buffer. */
+static char *build_fixture(int n_classes, int *out_len) {
+    /* Per class: ~140 chars (5-line def). Per call: ~50 chars. Overhead
+     * for the class number digits scales with log10(n) but the constant
+     * 256 covers up to 9-digit indices comfortably. */
+    int approx = n_classes * 256 + 1024;
+    char *buf = (char *)malloc((size_t)approx);
+    if (!buf) return NULL;
+    int pos = 0;
+    pos += snprintf(buf + pos, (size_t)(approx - pos),
+        "from typing import Self\n");
+    for (int i = 0; i < n_classes; i++) {
+        int n = snprintf(buf + pos, (size_t)(approx - pos),
+            "class Cls%d:\n"
+            "    def method(self) -> int:\n"
+            "        return %d\n"
+            "    def chain(self) -> Self:\n"
+            "        return self\n", i, i);
+        if (n < 0 || pos + n >= approx) break;
+        pos += n;
+    }
+    int n = snprintf(buf + pos, (size_t)(approx - pos), "def use():\n");
+    pos += n;
+    for (int i = 0; i < n_classes; i++) {
+        int m = snprintf(buf + pos, (size_t)(approx - pos),
+            "    Cls%d().chain().chain().method()\n", i);
+        if (m < 0 || pos + m >= approx) break;
+        pos += m;
+    }
+    *out_len = pos;
+    return buf;
+}
+
+static double measure(int n_classes, int *out_calls, int *out_resolved) {
+    int slen = 0;
+    char *src = build_fixture(n_classes, &slen);
+    if (!src) return -1.0;
+    struct timespec t0, t1;
+    clock_gettime(CLOCK_MONOTONIC, &t0);
+    CBMFileResult *r = cbm_extract_file(src, slen, CBM_LANG_PYTHON,
+        "test", "scale.py", 0, NULL, NULL);
+    clock_gettime(CLOCK_MONOTONIC, &t1);
+    double ms = elapsed_ms(t0, t1);
+    if (out_calls) *out_calls = r ? r->calls.count : 0;
+    if (out_resolved) *out_resolved = r ? r->resolved_calls.count : 0;
+    if (r) cbm_free_result(r);
+    free(src);
+    return ms;
+}
+
+TEST(pylsp_scale_linear_growth) {
+    int c100 = 0, r100 = 0;
+    int c500 = 0, r500 = 0;
+    int c2000 = 0, r2000 = 0;
+    double t100 = measure(100, &c100, &r100);
+    double t500 = measure(500, &c500, &r500);
+    double t2000 = measure(2000, &c2000, &r2000);
+    printf("    scale: 100=%.1fms (calls=%d resolved=%d)  500=%.1fms (calls=%d resolved=%d)  2000=%.1fms (calls=%d resolved=%d)\n",
+        t100, c100, r100, t500, c500, r500, t2000, c2000, r2000);
+
+    /* Sanity: each scale produces roughly the same resolution ratio. */
+    double r_pct_100 = c100 ? (double)r100 / c100 : 0.0;
+    double r_pct_2000 = c2000 ? (double)r2000 / c2000 : 0.0;
+    ASSERT(r_pct_100 > 0.5);
+    ASSERT(r_pct_2000 > 0.5);
+
+    /* Linear growth check: 20x input should be at most ~30x time
+     * (allowing constant-factor overhead). 20x with quadratic would be
+     * 400x — easy to detect. */
+    if (t100 > 0.5) {  // skip when t100 too small to compare reliably
+        double ratio = t2000 / t100;
+        printf("    scale ratio 2000/100: %.1fx (linear ~20x, quadratic ~400x)\n", ratio);
+        ASSERT(ratio < 100.0);  // generous bound; flags clear quadratic
+    }
+    PASS();
+}
+
+SUITE(py_lsp_scale) {
+    RUN_TEST(pylsp_scale_linear_growth);
+}