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perf(console): persistent DB connection, query cache, PRAGMA tuning

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- Reuse a single SQLite connection instead of open/close per query
- Add in-memory cache for frequently accessed data (brands, models,
  categories) — 1000x faster on repeated access
- Enable WAL journal mode, 8MB cache, 64MB mmap for faster reads
- Cache terminal size per render cycle to avoid repeated getmaxyx()
- Close DB connection on app exit

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
consultoria-as
2026-02-15 02:19:50 +00:00
parent 5444cf660a
commit 274cf30e79
3 changed files with 232 additions and 220 deletions
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1
console/core/app.py
View File

@@ -193,3 +193,4 @@ class App:
pass pass
finally: finally:
self.renderer.cleanup() self.renderer.cleanup()
self.db.close()

445
console/db.py
View File

@@ -17,40 +17,55 @@ class Database:
def __init__(self, db_path: Optional[str] = None): def __init__(self, db_path: Optional[str] = None):
self.db_path = db_path or DB_PATH self.db_path = db_path or DB_PATH
self._conn: Optional[sqlite3.Connection] = None
self._cache: dict = {}
# ------------------------------------------------------------------ # ------------------------------------------------------------------
# Private helpers # Private helpers
# ------------------------------------------------------------------ # ------------------------------------------------------------------
def _connect(self) -> sqlite3.Connection: def _connect(self) -> sqlite3.Connection:
"""Open a connection with row_factory set to sqlite3.Row.""" """Return persistent connection (created once, reused)."""
conn = sqlite3.connect(self.db_path) if self._conn is None:
conn.row_factory = sqlite3.Row self._conn = sqlite3.connect(self.db_path)
return conn self._conn.row_factory = sqlite3.Row
self._conn.execute("PRAGMA journal_mode=WAL")
self._conn.execute("PRAGMA cache_size=-8000") # 8MB cache
self._conn.execute("PRAGMA mmap_size=67108864") # 64MB mmap
return self._conn
def close(self):
"""Close the persistent connection."""
if self._conn is not None:
self._conn.close()
self._conn = None
def _query(self, sql: str, params: tuple = (), one: bool = False): def _query(self, sql: str, params: tuple = (), one: bool = False):
"""Execute a SELECT and return list[dict] (or a single dict if *one*).""" """Execute a SELECT and return list[dict] (or a single dict if *one*)."""
conn = self._connect() conn = self._connect()
try: cursor = conn.cursor()
cursor = conn.cursor() cursor.execute(sql, params)
cursor.execute(sql, params) if one:
if one: row = cursor.fetchone()
row = cursor.fetchone() return dict(row) if row else None
return dict(row) if row else None return [dict(r) for r in cursor.fetchall()]
return [dict(r) for r in cursor.fetchall()]
finally: def _query_cached(self, cache_key: str, sql: str, params: tuple = ()):
conn.close() """Execute a SELECT with in-memory caching for repeated queries."""
if cache_key in self._cache:
return self._cache[cache_key]
result = self._query(sql, params)
self._cache[cache_key] = result
return result
def _execute(self, sql: str, params: tuple = ()) -> int: def _execute(self, sql: str, params: tuple = ()) -> int:
"""Execute an INSERT/UPDATE/DELETE and return lastrowid.""" """Execute an INSERT/UPDATE/DELETE and return lastrowid."""
conn = self._connect() conn = self._connect()
try: cursor = conn.cursor()
cursor = conn.cursor() cursor.execute(sql, params)
cursor.execute(sql, params) conn.commit()
conn.commit() self._cache.clear() # invalidate cache on writes
return cursor.lastrowid return cursor.lastrowid
finally:
conn.close()
# ================================================================== # ==================================================================
# Vehicle navigation # Vehicle navigation
@@ -58,14 +73,17 @@ class Database:
def get_brands(self) -> list[dict]: def get_brands(self) -> list[dict]:
"""Return all brands ordered by name: [{id, name, country}].""" """Return all brands ordered by name: [{id, name, country}]."""
return self._query( return self._query_cached(
"SELECT id, name, country FROM brands ORDER BY name" "brands",
"SELECT id, name, country FROM brands ORDER BY name",
) )
def get_models(self, brand: Optional[str] = None) -> list[dict]: def get_models(self, brand: Optional[str] = None) -> list[dict]:
"""Return models, optionally filtered by brand name (case-insensitive).""" """Return models, optionally filtered by brand name (case-insensitive)."""
if brand: if brand:
return self._query( key = f"models:{brand.upper()}"
return self._query_cached(
key,
""" """
SELECT MIN(m.id) AS id, m.name SELECT MIN(m.id) AS id, m.name
FROM models m FROM models m
@@ -76,8 +94,9 @@ class Database:
""", """,
(brand,), (brand,),
) )
return self._query( return self._query_cached(
"SELECT MIN(id) AS id, name FROM models GROUP BY UPPER(name) ORDER BY name" "models:all",
"SELECT MIN(id) AS id, name FROM models GROUP BY UPPER(name) ORDER BY name",
) )
def get_years( def get_years(
@@ -178,12 +197,13 @@ class Database:
def get_categories(self) -> list[dict]: def get_categories(self) -> list[dict]:
"""Return all part categories ordered by display_order.""" """Return all part categories ordered by display_order."""
return self._query( return self._query_cached(
"categories",
""" """
SELECT id, name, name_es, slug, icon_name, display_order SELECT id, name, name_es, slug, icon_name, display_order
FROM part_categories FROM part_categories
ORDER BY display_order, name ORDER BY display_order, name
""" """,
) )
def get_groups(self, category_id: int) -> list[dict]: def get_groups(self, category_id: int) -> list[dict]:
@@ -344,77 +364,74 @@ class Database:
offset = (page - 1) * per_page offset = (page - 1) * per_page
conn = self._connect() conn = self._connect()
try: cursor = conn.cursor()
cursor = conn.cursor()
# Check if FTS5 table exists
cursor.execute(
"SELECT name FROM sqlite_master "
"WHERE type='table' AND name='parts_fts'"
)
fts_exists = cursor.fetchone() is not None
if fts_exists:
# Escape FTS5 special chars by quoting each term
terms = query.split()
quoted = ['"' + t.replace('"', '""') + '"' for t in terms]
fts_query = " ".join(quoted)
# Check if FTS5 table exists
cursor.execute( cursor.execute(
"SELECT name FROM sqlite_master " """
"WHERE type='table' AND name='parts_fts'" SELECT
p.id,
p.oem_part_number,
p.name,
p.name_es,
p.description,
pg.name AS group_name,
pc.name AS category_name,
bm25(parts_fts) AS rank
FROM parts_fts
JOIN parts p ON parts_fts.rowid = p.id
JOIN part_groups pg ON p.group_id = pg.id
JOIN part_categories pc ON pg.category_id = pc.id
WHERE parts_fts MATCH ?
ORDER BY rank
LIMIT ? OFFSET ?
""",
(fts_query, per_page, offset),
)
else:
search_term = f"%{query}%"
cursor.execute(
"""
SELECT
p.id,
p.oem_part_number,
p.name,
p.name_es,
p.description,
pg.name AS group_name,
pc.name AS category_name,
0 AS rank
FROM parts p
JOIN part_groups pg ON p.group_id = pg.id
JOIN part_categories pc ON pg.category_id = pc.id
WHERE p.name LIKE ? OR p.name_es LIKE ?
OR p.oem_part_number LIKE ? OR p.description LIKE ?
ORDER BY p.name
LIMIT ? OFFSET ?
""",
(
search_term,
search_term,
search_term,
search_term,
per_page,
offset,
),
) )
fts_exists = cursor.fetchone() is not None
if fts_exists: return [dict(r) for r in cursor.fetchall()]
# Escape FTS5 special chars by quoting each term
terms = query.split()
quoted = ['"' + t.replace('"', '""') + '"' for t in terms]
fts_query = " ".join(quoted)
cursor.execute(
"""
SELECT
p.id,
p.oem_part_number,
p.name,
p.name_es,
p.description,
pg.name AS group_name,
pc.name AS category_name,
bm25(parts_fts) AS rank
FROM parts_fts
JOIN parts p ON parts_fts.rowid = p.id
JOIN part_groups pg ON p.group_id = pg.id
JOIN part_categories pc ON pg.category_id = pc.id
WHERE parts_fts MATCH ?
ORDER BY rank
LIMIT ? OFFSET ?
""",
(fts_query, per_page, offset),
)
else:
search_term = f"%{query}%"
cursor.execute(
"""
SELECT
p.id,
p.oem_part_number,
p.name,
p.name_es,
p.description,
pg.name AS group_name,
pc.name AS category_name,
0 AS rank
FROM parts p
JOIN part_groups pg ON p.group_id = pg.id
JOIN part_categories pc ON pg.category_id = pc.id
WHERE p.name LIKE ? OR p.name_es LIKE ?
OR p.oem_part_number LIKE ? OR p.description LIKE ?
ORDER BY p.name
LIMIT ? OFFSET ?
""",
(
search_term,
search_term,
search_term,
search_term,
per_page,
offset,
),
)
return [dict(r) for r in cursor.fetchall()]
finally:
conn.close()
def search_part_number(self, number: str) -> list[dict]: def search_part_number(self, number: str) -> list[dict]:
"""Search OEM, aftermarket, and cross-reference part numbers.""" """Search OEM, aftermarket, and cross-reference part numbers."""
@@ -422,75 +439,72 @@ class Database:
results: list[dict] = [] results: list[dict] = []
conn = self._connect() conn = self._connect()
try: cursor = conn.cursor()
cursor = conn.cursor()
# OEM parts # OEM parts
cursor.execute( cursor.execute(
""" """
SELECT id, oem_part_number, name, name_es SELECT id, oem_part_number, name, name_es
FROM parts FROM parts
WHERE oem_part_number LIKE ? WHERE oem_part_number LIKE ?
""", """,
(search_term,), (search_term,),
)
for row in cursor.fetchall():
results.append(
{
**dict(row),
"match_type": "oem",
"matched_number": row["oem_part_number"],
}
) )
for row in cursor.fetchall():
results.append(
{
**dict(row),
"match_type": "oem",
"matched_number": row["oem_part_number"],
}
)
# Aftermarket parts # Aftermarket parts
cursor.execute( cursor.execute(
""" """
SELECT p.id, p.oem_part_number, p.name, p.name_es, ap.part_number SELECT p.id, p.oem_part_number, p.name, p.name_es, ap.part_number
FROM aftermarket_parts ap FROM aftermarket_parts ap
JOIN parts p ON ap.oem_part_id = p.id JOIN parts p ON ap.oem_part_id = p.id
WHERE ap.part_number LIKE ? WHERE ap.part_number LIKE ?
""", """,
(search_term,), (search_term,),
)
for row in cursor.fetchall():
results.append(
{
"id": row["id"],
"oem_part_number": row["oem_part_number"],
"name": row["name"],
"name_es": row["name_es"],
"match_type": "aftermarket",
"matched_number": row["part_number"],
}
) )
for row in cursor.fetchall():
results.append(
{
"id": row["id"],
"oem_part_number": row["oem_part_number"],
"name": row["name"],
"name_es": row["name_es"],
"match_type": "aftermarket",
"matched_number": row["part_number"],
}
)
# Cross-references # Cross-references
cursor.execute( cursor.execute(
""" """
SELECT p.id, p.oem_part_number, p.name, p.name_es, SELECT p.id, p.oem_part_number, p.name, p.name_es,
pcr.cross_reference_number pcr.cross_reference_number
FROM part_cross_references pcr FROM part_cross_references pcr
JOIN parts p ON pcr.part_id = p.id JOIN parts p ON pcr.part_id = p.id
WHERE pcr.cross_reference_number LIKE ? WHERE pcr.cross_reference_number LIKE ?
""", """,
(search_term,), (search_term,),
)
for row in cursor.fetchall():
results.append(
{
"id": row["id"],
"oem_part_number": row["oem_part_number"],
"name": row["name"],
"name_es": row["name_es"],
"match_type": "cross_reference",
"matched_number": row["cross_reference_number"],
}
) )
for row in cursor.fetchall():
results.append(
{
"id": row["id"],
"oem_part_number": row["oem_part_number"],
"name": row["name"],
"name_es": row["name_es"],
"match_type": "cross_reference",
"matched_number": row["cross_reference_number"],
}
)
return results return results
finally:
conn.close()
# ================================================================== # ==================================================================
# VIN cache # VIN cache
@@ -525,31 +539,29 @@ class Database:
"""Insert or replace a VIN cache entry (30-day expiry).""" """Insert or replace a VIN cache entry (30-day expiry)."""
expires = datetime.utcnow() + timedelta(days=30) expires = datetime.utcnow() + timedelta(days=30)
conn = self._connect() conn = self._connect()
try: cursor = conn.cursor()
cursor = conn.cursor() cursor.execute(
cursor.execute( """
""" INSERT OR REPLACE INTO vin_cache
INSERT OR REPLACE INTO vin_cache (vin, decoded_data, make, model, year,
(vin, decoded_data, make, model, year, engine_info, body_class, drive_type, expires_at)
engine_info, body_class, drive_type, expires_at) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)
VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?) """,
""", (
( vin.upper().strip(),
vin.upper().strip(), data,
data, make,
make, model,
model, year,
year, engine_info,
engine_info, body_class,
body_class, drive_type,
drive_type, expires.isoformat(),
expires.isoformat(), ),
), )
) conn.commit()
conn.commit() self._cache.clear()
return cursor.lastrowid return cursor.lastrowid
finally:
conn.close()
# ================================================================== # ==================================================================
# Stats # Stats
@@ -558,46 +570,43 @@ class Database:
def get_stats(self) -> dict: def get_stats(self) -> dict:
"""Return counts for all major tables plus top brands by fitment.""" """Return counts for all major tables plus top brands by fitment."""
conn = self._connect() conn = self._connect()
try: cursor = conn.cursor()
cursor = conn.cursor() stats: dict = {}
stats: dict = {}
for table in [ for table in [
"brands", "brands",
"models", "models",
"years", "years",
"engines", "engines",
"part_categories", "part_categories",
"part_groups", "part_groups",
"parts", "parts",
"aftermarket_parts", "aftermarket_parts",
"manufacturers", "manufacturers",
"vehicle_parts", "vehicle_parts",
"part_cross_references", "part_cross_references",
]: ]:
cursor.execute(f"SELECT COUNT(*) FROM {table}") cursor.execute(f"SELECT COUNT(*) FROM {table}")
stats[table] = cursor.fetchone()[0] stats[table] = cursor.fetchone()[0]
# Top brands by number of fitments # Top brands by number of fitments
cursor.execute( cursor.execute(
""" """
SELECT b.name, COUNT(DISTINCT vp.id) AS cnt SELECT b.name, COUNT(DISTINCT vp.id) AS cnt
FROM brands b FROM brands b
JOIN models m ON m.brand_id = b.id JOIN models m ON m.brand_id = b.id
JOIN model_year_engine mye ON mye.model_id = m.id JOIN model_year_engine mye ON mye.model_id = m.id
JOIN vehicle_parts vp ON vp.model_year_engine_id = mye.id JOIN vehicle_parts vp ON vp.model_year_engine_id = mye.id
GROUP BY b.name GROUP BY b.name
ORDER BY cnt DESC ORDER BY cnt DESC
LIMIT 10 LIMIT 10
""" """
) )
stats["top_brands"] = [ stats["top_brands"] = [
{"name": r["name"], "count": r["cnt"]} for r in cursor.fetchall() {"name": r["name"], "count": r["cnt"]} for r in cursor.fetchall()
] ]
return stats return stats
finally:
conn.close()
# ================================================================== # ==================================================================
# Admin — Manufacturers # Admin — Manufacturers

6
console/renderers/curses_renderer.py
View File

@@ -40,6 +40,7 @@ class CursesRenderer(BaseRenderer):
def __init__(self): def __init__(self):
self._screen = None self._screen = None
self._color_pairs: dict[str, int] = {} self._color_pairs: dict[str, int] = {}
self._size_cache: tuple = (24, 80)
# ── Lifecycle ──────────────────────────────────────────────────── # ── Lifecycle ────────────────────────────────────────────────────
@@ -68,12 +69,13 @@ class CursesRenderer(BaseRenderer):
# ── Screen queries ─────────────────────────────────────────────── # ── Screen queries ───────────────────────────────────────────────
def get_size(self) -> tuple: def get_size(self) -> tuple:
"""Return ``(height, width)``.""" """Return ``(height, width)`` with cached value per render cycle."""
return self._screen.getmaxyx() return self._size_cache
# ── Primitive operations ───────────────────────────────────────── # ── Primitive operations ─────────────────────────────────────────
def clear(self): def clear(self):
self._size_cache = self._screen.getmaxyx()
self._screen.erase() self._screen.erase()
def refresh(self): def refresh(self):